The fragrance industry speaks its own language, and it isn’t always clear — even for professionals. Here are plain-English definitions and real examples for the terms you’ll meet while sampling, formulating, and buying fragrance oils. Type a term below for a quick lookup, or browse by category.
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How a fragrance is built, and the words the industry uses to talk about it.
A blend of raw materials composed to read as a single, unified scent — the fragrance equivalent of a chord in music. Perfumers build accords first, then build fragrances from accords.
Example: A classic amber accord blends labdanum, vanilla, and balsamic notes into one warm impression.
A single identifiable scent within a fragrance — rose, sandalwood, bergamot. Notes are what you name when you describe what you smell. The term is sometimes used loosely for a whole accord.
Example: A candle described as "cedar, amber, and vanilla" is naming its three dominant notes.
The first materials you smell after application — light, volatile molecules like citrus, herbs, and aldehydes that evaporate within minutes to half an hour. Top notes create the first impression and disappear first.
Example: The lemon burst when you first smell a fragrance on a blotter is a top note doing its job.
The body of the fragrance, emerging as the top notes fade — typically florals and spices that carry the character for the first few hours and bridge into the base.
Example: In a rose-centered fragrance, the rose itself usually lives in the heart.
The slowest-evaporating materials — woods, musks, resins, vanilla — that anchor the fragrance and remain long after the rest has gone. Base notes drive longevity.
Example: The soft musk left on a scarf the next day is the base note.
The standard diagram of a fragrance’s structure: top notes at the peak, heart notes in the middle, base notes at the foundation. It describes evaporation over time, not importance.
Example: Product pages often show an olfactive pyramid so buyers can predict how the scent evolves.
The final stage of a fragrance’s evaporation, when only the base remains. Professionals judge a fragrance by its dry down as much as its opening — it is what customers live with.
Example: Evaluate a blotter again at six and twenty-four hours to know the true dry down.
The scent trail a fragrance leaves in the air as the wearer moves — from the French for "wake," as behind a boat. High-sillage fragrances announce themselves; low-sillage fragrances stay close to the skin.
Example: A room that still smells of someone’s perfume after they leave experienced strong sillage.
How long a fragrance remains perceptible after application or use. Driven by molecular weight, concentration, and the product base — the same oil lasts differently in perfume, soap, or a candle.
Example: A fragrance rich in musks and woods will typically outlast a citrus-dominant one by hours.
The staying power of a fragrance material or finished fragrance — its ability to remain perceptible over time. Closely related to longevity, but usually applied to individual raw materials.
Example: Oakmoss and patchouli are prized for tenacity; lemon oil has almost none.
How well a fragrance clings to a substrate — skin, hair, fabric — through time, rinsing, or drying. Critical in laundry and personal care, where the scent must survive processing.
Example: A laundry fragrance is judged on substantivity: what survives the wash and the dryer.
How readily a fragrance radiates into the air around it. A diffusive fragrance fills a space quickly; a flat one stays put. Diffusion is engineered through material selection, not just dosage.
Example: A reed diffuser formula lives or dies on diffusion — the scent has to travel without heat.
The amount of diffusion a fragrance shows in a finished product — its ability to rise out of the base and be noticed. A fragrance with good lift performs at lower dosages.
Example: Professionally concentrated oils show more lift than solvent-heavy oils at the same dosage.
A fragrance that smells essentially the same from application to dry down, without distinct stages. Linear is a design choice, not a flaw — many home-fragrance products are intentionally linear.
Example: A single-note vanilla room spray is linear by design: what you smell first is what you get.
The fullness and complexity of a fragrance through its heart and base. A fragrance lacking body reads as "thin" — sharp at the top with nothing underneath.
Example: Adding a woody-musk foundation gives a sparkling citrus composition body.
The combined effect of all ingredients in a complete, properly aged fragrance — the total impression rather than any single note. Borrowed from the language of wine.
Example: After compounding and aging, the perfumer evaluates the bouquet, not the parts.
The industry’s name for a professional perfumer — someone trained to compose fragrance from thousands of raw materials. Formal training takes years and typically includes chemistry.
Example: All of our original formulas are created by Cécile Hua, a professional French perfumer with over 20 years experience in the industry.
The document a brand gives a perfumer to start a custom project: the concept, audience, olfactive direction, product applications, compliance requirements, and budget. A sharper brief produces a better fragrance.
Example: A brief might read: "a green fig scent for a candle and lotion line, Clean at Sephora–compliant." See our custom fragrance design process.
A strip of absorbent paper used to evaluate fragrance without applying it to skin. Blotters let you compare several oils side by side and revisit them as they dry down.
Example: Professional evaluation smells a blotter at intervals — fresh, 30 minutes, 2 hours, 24 hours.
The traditional tiers describing how much fragrance concentrate a finished alcoholic perfume contains — extrait highest, then eau de parfum, eau de toilette, and eau de cologne. They are conventions rather than legal grades — and they describe a finished product, not the strength of a fragrance oil itself.
Example: A typical eau de parfum runs 15–20% concentrate in alcohol; an extrait runs higher still.
A pre-compounded accord sold as a single building block — a ready-made rose, a ready-made leather — that a perfumer drops into a formula instead of assembling it from raw materials. Not to be confused with base notes, which describe where a material sits in the evaporation curve.
Example: Two fragrances built on the same commercial base can smell like cousins, because part of the formula is literally identical.
The traditional oil-based perfume of South Asia and the Middle East, historically distilled directly into a sandalwood oil base rather than diluted in alcohol. Worn as a concentrate, in very small amounts.
Example: An attar is applied by the drop to pulse points — the format predates alcohol perfumery by centuries.
The industry sorts every scent into families — and describes them with a vocabulary all its own.
A broad category grouping fragrances with a shared character — floral, woody, amber, fresh, and their many subfamilies. Families are the starting point for describing a fragrance, not the whole story.
Example: Browse our library by character: floral, woody, citrus, amber & musk, and more.
The largest olfactive family — fragrances built around flowers, from single blossoms to lush mixed bouquets. Floral notes can be fresh, powdery, creamy, or green depending on treatment.
Example: Rose, jasmine, tuberose, and lily of the valley are pillars of the floral family.
A fragrance composed to portray a single flower — one rose, one gardenia — rather than a bouquet. Deceptively difficult: most single flowers require dozens of materials to render faithfully.
Example: A convincing lily soliflore may contain no lily extract at all; the flower yields no usable oil.
Fragrances dominated by citrus peel oils — lemon, bergamot, orange, grapefruit, mandarin. Bright, volatile, and universally legible, citrus materials are classic top notes.
Example: An eau de cologne is traditionally a citrus composition by definition.
Notes evoking non-citrus fruit — peach, berry, apple, pear, tropical fruits. Almost always built from aroma chemicals, since most fruits yield no extractable oil.
Example: The peach note in countless modern fragrances comes from a lactone, not a peach. Browse fruity fragrance oils.
Descriptors of crushed leaves, cut grass, stems, and sap — crisp, natural, and vegetal. Green notes freshen florals and read as outdoors.
Example: Galbanum and cis-3-hexenol give the "snapped stem" effect in green fragrances.
Fragrances evoking sea air, rain, and open water — a modern family built on materials like Calone. Clean, transparent, and airy.
Example: The "sea breeze" character of 1990s fragrances defined the aquatic family.
Fragrances built on culinary and medicinal herbs — lavender, rosemary, sage, mint, basil. Traditionally the backbone of masculine perfumery, now used across categories.
Example: A lavender-rosemary shower gel is a textbook aromatic.
A classic fragrance family (French for "fern") built on a fixed skeleton: lavender top, oakmoss and coumarin base — the smell of new-mown hay and barbershops. One of perfumery’s oldest formulas.
Example: Most traditional men’s grooming scents descend from the fougère structure.
A family named for Coty’s 1917 Chypre ("Cyprus"): a strict architecture of bergamot top, floral heart, and a mossy base of oakmoss, labdanum, and patchouli. Elegant, dry, and enduring.
Example: A chypre reads as polished and grown-up — the opposite of a simple fruity-sweet scent.
Fragrances anchored in wood notes — sandalwood, cedar, vetiver, patchouli, guaiac. Warm and creamy or dry and smoky depending on the wood.
Example: Cedar pencil shavings and creamy sandalwood are both woody, at opposite ends of the family.
A family built on warmth: vanilla, resins, labdanum, spices, and musks. "Amber" in perfumery names this accord, not the fossilized resin. The industry has largely adopted "amber" over the older term "oriental."
Example: A vanilla-labdanum-benzoin base gives the enveloping warmth of an amber fragrance.
Fragrances that smell deliberately edible — vanilla, caramel, chocolate, coffee, baked goods. A young family, born in the 1990s, and a powerhouse in candles.
Example: A "vanilla bourbon brûlée" candle is pure gourmand.
Originally an animal-derived material, now a large family of synthetic molecules ranging from clean-laundry soft to warm and skin-like. Musks round out compositions and act as fixatives.
Example: "Clean musk" is the signature of countless laundry and personal care products.
Descriptors of warm, sensual, slightly feral notes historically drawn from civet, castoreum, and musk — all replaced by synthetics in modern professional perfumery. Used in traces, animalic notes add depth and humanity.
Example: A whisper of animalic musk keeps a floral from smelling like soap.
The sparkling, slightly soapy-waxy effect of aliphatic aldehydes used in overdose — the signature of classic 1920s-style florals. Reads as "champagne fizz" or freshly starched linen.
Example: Chanel N°5 made the aldehydic floral a permanent category.
A soft, dry character associated with talcum, iris, violet, and certain musks. Powdery notes read as comforting, vintage, and cosmetic.
Example: Iris and violet give "makeup drawer" powder in many classic florals.
Warm, rich, slightly sweet notes from tree resins and balsams — benzoin, tolu, Peru balsam, labdanum. The load-bearing sweetness in most amber bases.
Example: Benzoin’s vanilla-cinnamon warmth is balsamic sweetness in its purest form.
Notes drawn from cooking spices — cinnamon, clove, cardamom, pink pepper, ginger. Warm spices comfort; fresh spices energize.
Example: Pink pepper on top and cinnamon in the heart make a fragrance read spicy from open to dry down.
The deep forest-floor character of oakmoss, patchouli, and vetiver — damp earth, bark, and undergrowth. The backbone of the chypre family.
Example: A "walk in the woods after rain" scent leans on mossy, earthy materials.
A family evoking cured hides, smoke, and birch tar — dry, dark, and assertive. Modern leather notes are built entirely from aroma chemicals.
Example: A "leather-bound library" candle pairs leather notes with woods and paper-like musks.
A descriptor (not a formal family) for scents that read as soap, laundry, air, and water — built from clean musks, ozonic notes, light florals, and citrus. The most requested character in home and personal care.
Example: Our Fresh & Clean collection gathers this character across families.
A fragrance fault: excessive sweetness or heaviness that fatigues the nose. What is rich at a low dosage can be cloying when overdosed.
Example: An overloaded gourmand candle turns from "warm vanilla" to cloying in one burn.
A fragrance built to sit close to the skin rather than fill a room — soft musks, clean woods, quiet warmth. Low sillage is the intent, not a shortfall; it is a different brief from a statement fragrance, not a weaker one.
Example: Judge a skin scent at arm’s length after an hour — its job is intimacy, not projection.
A descriptor for the cooling, penetrating, faintly medicinal quality of camphor, eucalyptus, rosemary, and tea tree. Clearing rather than pretty — used in small amounts to open a blend up or to signal “clean.”
Example: The bracing top of a eucalyptus-mint shower gel is a camphoraceous effect doing its job.
What fragrance is actually made of — the industry isn’t always clear about this, so here it is in plain English.
A complete, professionally designed fragrance formula — a blend of natural extracts, natural isolates, and man-made aroma materials engineered for a finished product. Not a single ingredient, and not a diluted "scent" — a finished composition.
Example: One fragrance oil can contain 50–150 raw materials balanced for performance and compliance.
A volatile oil obtained from a single botanical source by steam distillation or cold pressing — lavender oil, lemon oil, peppermint oil. A raw material, not a finished fragrance; composition varies by crop, region, and season.
Example: Lavender essential oil from two harvests can smell noticeably different — a key reason professional formulas blend materials. More: Natural vs. Synthetic Fragrance.
A highly concentrated aromatic extract obtained by solvent extraction, used for flowers too delicate for steam distillation — jasmine, tuberose, mimosa. Richer and closer to the living flower than an essential oil.
Example: It takes roughly 8,000 hand-picked jasmine blossoms to yield a single gram of jasmine absolute.
A single scent molecule used as a perfumery ingredient — whether synthesized or isolated from a natural source. Aroma chemicals give perfumers precision, consistency, and effects nature cannot supply.
Example: Vanillin, linalool, and Iso E Super are aroma chemicals found in most modern fragrances.
A single molecule separated from a natural source — linalool isolated from rosewood or ho wood, citral from lemongrass. Chemically identical to its synthetic twin, but natural in origin.
Example: ISO 9235–compliant formulas may use natural isolates where a conventional formula would use synthetics.
A synthesized molecule that exists in nature in exactly the same form — man-made vanillin is nature-identical to the vanillin in a vanilla bean. Origin differs; the molecule does not.
Example: Nature-identical vanillin behaves the same on your nose and in your SDS as the extracted version.
An aroma material produced by chemical synthesis. Some replicate nature; others are new molecules entirely. Synthetics are evaluated under the same IFRA and RIFM safety frameworks as naturals — origin does not determine safety.
Example: Modern musks are synthetics designed to be more biodegradable and lower-allergen than what they replaced.
The large family of hydrocarbons that dominate citrus and conifer oils — limonene and pinene being the most familiar. Highly volatile and prone to oxidation, which is why citrus oils have short shelf lives.
Example: Limonene makes up more than 90% of orange oil — and appears on allergen declarations when present.
The principal aroma molecule of the vanilla bean and one of the most used materials in perfumery. Sweet, creamy, and universally loved — and famous for turning products brown (see Discoloration).
Example: A high-vanillin fragrance will darken white candles and soaps over time; formulate accordingly.
A lichen extract with a deep forest-floor odor — the defining base of chypres and fougères. Heavily restricted by IFRA for skin allergens; modern fragrances use low-atranol grades or synthetic substitutes.
Example: The mossy dry down of classic perfumery is oakmoss — now usually a compliant reconstruction.
Aromatic saps and exudates from trees and shrubs — frankincense, myrrh, benzoin, labdanum, tolu. Ancient perfumery materials that give warmth, sweetness, and fixation.
Example: The incense in an amber base is usually frankincense (olibanum) resin.
A legendary material expelled by sperm whales that develops a warm, salty-sweet, skin-like odor after years at sea. Prized historically as a fixative; replaced in professional perfumery by synthetics like Ambroxan.
Example: The "ambergris" listed in a modern fragrance is a synthetic reconstruction, not the animal material.
A material that slows the evaporation of everything around it, extending a fragrance’s life. Musks, resins, and heavy woods are natural fixatives.
Example: Without fixatives, a fine fragrance would vanish within the hour.
The liquid a fragrance is delivered in — commonly DPG, IPM, or alcohol. Carriers make handling and dosing possible; excessive carrier is dilution.
Example: Perfumer’s alcohol is the carrier in a finished eau de parfum.
A neutral solvent used to cut a fragrance’s concentration. Some fragrance oils on the market carry very high solvent loads — which weakens performance and is why comparing oils on price alone misleads.
Example: Two "identical" oils at different prices may differ mainly in how much diluent one contains. See Fragrance Strength & Longevity.
A family of plasticizer chemicals, historically used (as DEP) to dilute fragrance oils. Widely phased out in response to consumer and retailer standards.
Example: All of our oils are phthalate-free — browse the phthalate-free collection.
A fragrance blended not to be noticed but to cancel something else out — the raw smell of a soap base, a plant butter, a surfactant, a solvent. The aim is a product that reads as neutral, not as scented, so the dose is usually a fraction of what a scented version of the same product would carry.
Example: A cocoa-butter lotion that smells faintly of the butter itself needs a masking fragrance, not a perfume — and that is usually a custom brief.
The smallest amount of a material you can still smell. It varies enormously from one material to the next, which is why a percentage on a formula sheet tells you little about how loud a note will read — a low-threshold molecule at a fraction of a percent can run over ten percent of something quiet.
Example: If a tiny addition swings the whole blend, you are working with a low-threshold material — pull it back before you add anything else. More in Fragrance Strength & Longevity.
The specific ingredients behind the notes — what each one is, where it comes from, and what it actually smells like.
A jasmine-family aroma chemical — methyl dihydrojasmonate — and one of the most widely used materials in all of modern perfumery. Perfumers reach for it less as a note than as a way to open a composition up.
Source: Man-made. A Firmenich (now dsm-firmenich) trademark — other houses sell the same molecule under their own names.
Smells like: Barely anything on its own — a transparent, airy jasmine with a citrus edge. Its real job is what it does to everything else: it adds radiance, lift, and roundness, and makes a composition seem to fill the room.
A woody-amber aroma chemical used at very high levels across the industry. Unusual in that many people can barely smell it on its own, while still noticing what it does to a blend.
Source: Man-made. An IFF trademark, created in their lab in 1973; equivalents trade under other names.
Smells like: Dry, velvety cedar-like wood with a soft ambery warmth and a skin-like quality. Smooth rather than sharp; it sits close and gives a fragrance a warm, radiant halo.
A polycyclic musk and one of the workhorses of the industry — used heavily in laundry, cleaning, and personal care as well as fine fragrance. Very tenacious, which is why it survives a wash cycle.
Source: Man-made. An IFF trademark, and one of the most-produced musks in the world.
Smells like: Clean, soft, slightly sweet white musk — the “fresh laundry” smell most people picture. Smooth and rounded, with none of the animal quality older musks carried.
The aroma chemical that created the modern aquatic family. Powerful enough to be used in traces — overdosing it is what made a certain era of fragrance smell dated.
Source: Man-made. Discovered at Pfizer in 1966; now sold by Firmenich (dsm-firmenich) as Calone 1951.
Smells like: Sea air and ozone with a melon-cucumber edge — cool, watery, and transparent. Unmistakable once you know it.
The modern stand-in for ambergris, and the reason no one needs the whale-derived material. Now one of the most heavily used materials in contemporary perfumery.
Source: Nature-derived — built from sclareol, a molecule taken from clary sage. “Ambroxan” is Kao’s trademark (originally Henkel); the same molecule sells as Ambrox (Firmenich), Ambrofix (Givaudan), Orcanox (Mane), and Cetalox (IFF).
Smells like: Dry, warm amber with a mineral, almost salty character and a skin-like softness. Less sweet than a vanilla-amber; it reads clean and slightly abstract.
The aroma chemical behind most gourmand fragrance. Extremely powerful and used in traces — a little makes a composition edible, more makes it sickly.
Source: Man-made. A commodity aroma chemical produced by many manufacturers, not a proprietary material.
Smells like: Burnt sugar, caramel, and cotton candy. Sweet in the most literal sense, with a toasted edge.
One of the oldest synthetics in perfumery and half the backbone of the fougère family. Declarable as a regulated allergen, so it often appears on finished-product labels.
Source: Both. Occurs naturally in tonka bean and hay; the material used in formulas is normally synthesized. Commodity, many producers.
Smells like: New-mown hay with almond and vanilla warmth — sweet, dry, and soft. The barbershop smell in traditional grooming scents.
One of the most common single molecules in all of perfumery, and one of the names most often seen on a finished product label — it is a declarable allergen.
Source: Both. Occurs naturally in lavender, coriander, and rosewood, and is also made synthetically at scale. Commodity, many producers.
Smells like: Soft, fresh floral with a woody-citrus edge — the recognizable part of lavender, minus the herbal sharpness.
The dominant molecule in citrus peel oils, making up the bulk of orange oil in particular. A declarable allergen, which is why it turns up on so many labels.
Source: Mostly natural. Largely recovered as a co-product of citrus juice production; also produced synthetically. Commodity.
Smells like: Bright, zesty orange and lemon peel. Fresh and immediately legible, but it fades fast and oxidizes easily.
The standard fragrance solvent, used to dilute fragrance concentrate to a workable strength. Not a scent material at all — it is what much of the industry uses in place of phthalates.
Source: Man-made. A commodity industrial solvent from large chemical producers — bought to a high-purity, low-odor grade for fragrance work.
Smells like: Essentially nothing, which is the entire point. A solvent with an odor of its own would distort every formula it touched.
A light ester used as a fragrance solvent and carrier, particularly where the product touches skin. Chosen over DPG when a formula needs a lighter, more cosmetic feel.
Source: Man-made. A commodity ester, produced widely for cosmetics and fragrance.
Smells like: Near-odorless, with a faintly oily softness. Like DPG, its value is in staying out of the way.
A solvent used as the naturally-derived alternative to conventional diluents — the usual choice when a formula has to satisfy a natural or clean-beauty standard.
Source: Nature-derived — made from citric acid. Commodity, and the usual pick when a formula has to read as naturally derived.
Smells like: Very faint, with a mild citrus trace — quiet enough for most formulas, though not as invisible as DPG.
A sticky aromatic resin, one of perfumery’s oldest materials, and the load-bearing element in most amber accords.
Source: Natural. Harvested from cistus (rockrose) shrubs, mainly in Spain and Morocco.
Smells like: Warm, dark, and resinous — leather, honey, dried fruit, and a touch of smoke. Sweet, but heavy rather than sugary.
Not the iris flower but its underground rhizome — and one of the most expensive materials in perfumery, because the aroma only develops over years of aging and the yield is tiny.
Source: Natural. Grown mainly in Italy and Morocco, then dried and aged for years before distilling.
Smells like: Cool, dry, powdery violet with an earthy, root-vegetable edge — closer to cosmetic powder and clay than to a flower.
A naturally coumarin-rich bean, used as an extract in its own right where a formula wants more character and depth than coumarin alone provides.
Source: Natural. The seed of the Dipteryx odorata tree, mainly from Venezuela, Brazil, and Nigeria.
Smells like: Almond, hay, and vanilla with a tobacco warmth — sweet, soft, and slightly boozy.
A root material and one of the great building blocks of woody perfumery. Origin changes the smell noticeably, which is why perfumers specify which vetiver they mean.
Source: Natural. Distilled from the roots of a tropical grass, grown mainly in Haiti, Java, and India.
Smells like: Earthy and woody with smoke and damp soil — Haitian leans brighter and slightly grapefruity, Javanese darker and more burnt.
A rose-family molecule and one of the most frequently declared fragrance allergens — it appears on a large share of cosmetic ingredient lists.
Source: Both. Occurs naturally in rose, geranium, palmarosa, and citronella oils, and is also produced synthetically. Commodity, many producers.
Smells like: Sweet, soft rose with a fresh green-citrus edge — cleaner and less rich than a rose extract.
A rose-and-citrus molecule closely related to geraniol, and another of the allergens most commonly declared on finished-product labels.
Source: Both. Found in rose, geranium, and citronella oils; also made synthetically at scale. Commodity, many producers.
Smells like: Fresh rose with a lemony, slightly waxy lift — brighter and lighter than geraniol.
The molecule that carries the smell of clove. A declarable allergen, and restricted by IFRA in skin-contact products.
Source: Both. The main constituent of clove and cinnamon leaf oils; also synthesized. Commodity, many producers.
Smells like: Warm, sweet-spicy clove with a dry woody edge and a faint medicinal note.
A close relative of eugenol, held to tighter IFRA limits because it is the stronger skin sensitizer of the two. Declarable on labels.
Source: Both. Occurs in ylang-ylang and nutmeg oils; also synthesized. Commodity.
Smells like: Sweeter and more floral than eugenol — carnation and clove with a creamy warmth.
The molecule behind the smell of lemon, and a declarable allergen. It oxidizes readily, which is part of why citrus formulas need stabilizing and careful storage.
Source: Both. The dominant component of lemongrass and litsea cubeba oils; also produced synthetically. Commodity.
Smells like: Sharp, sweet lemon peel — the most literal lemon note in perfumery.
A widely used floral aroma chemical, and one of the allergens seen most often on labels — largely because it appears in so many detergents and personal care products.
Source: Man-made. Commodity, many producers.
Smells like: Soft jasmine with a green, slightly fatty warmth. Quiet on its own, and easy to overdose without noticing.
A soft floral material that doubles as a fixative, used at high levels across personal care. One of the most common allergen names on an ingredient list.
Source: Man-made. Commodity, many producers.
Smells like: Faint sweet-balsamic floral — so soft that its real job is holding other materials down rather than adding a note of its own.
A material doing three jobs at once — solvent, preservative, and mild floral note. Declarable as an allergen, which is why it shows up on labels even when it was added purely as a solvent.
Source: Both. Occurs in jasmine, ylang-ylang, and balsams; produced synthetically at scale. Commodity.
Smells like: Very faint, slightly sweet and almond-like.
A fixative and solvent that is also a declarable allergen — one reason an ingredient list can name a fragrance allergen that was never there for its smell at all.
Source: Both. Present in Peru balsam, tolu, and benzoin resins; also made synthetically. Commodity.
Smells like: Very faint, warm and slightly balsamic — closer to a texture than a note.
A violet-orris aroma chemical used very widely in fine fragrance and personal care, and a declarable allergen.
Source: Man-made. Commodity, many producers.
Smells like: Powdery violet with a woody, slightly fruity dryness — the cosmetic-powder effect in many florals.
The molecule that carries cinnamon. A declarable allergen and a known sensitizer, so IFRA restricts it tightly in anything that touches skin.
Source: Both. The main constituent of cinnamon bark oil; also synthesized. Commodity.
Smells like: Hot, sweet, unmistakable cinnamon — spicy with a balsamic edge.
A classic lily-of-the-valley material, declarable on labels and restricted by IFRA for sensitization.
Source: Man-made. Commodity.
Smells like: Sweet, green, watery lily of the valley with a soft melon edge.
A lily-of-the-valley material that was used almost everywhere until the EU classified it as toxic to reproduction and banned it from cosmetics in March 2022. IFRA prohibits it. Reformulating around it forced a wave of relaunches — if a familiar scent changed around then, this is often why.
Source: Man-made. Formerly a commodity material; no longer permitted in EU cosmetics.
Smells like: Fresh, airy lily of the valley with a cyclamen sweetness — a clean effect that proved genuinely hard to replace.
Another lily-of-the-valley material, prohibited by IFRA and banned from EU cosmetics over its sensitization potential. Like Lilial, its removal quietly changed a great many familiar fragrances.
Source: Man-made. Formerly widely used; no longer permitted in EU cosmetics.
Smells like: Sweet, green lily of the valley — softer and rounder than Lilial.
One of the most expensive and most imitated materials in perfumery. It forms only when an Aquilaria tree is infected by a particular fungus and lays down dark resin in its heartwood as a defense — so the aroma is a product of disease, not of healthy wood.
Source: Natural, and genuinely scarce — Aquilaria trees in Southeast Asia. Wild harvest is heavily restricted, so supply is largely plantation-grown or deliberately inoculated, and the great majority of “oud” in commercial fragrance is a synthetic reconstruction rather than the real extract.
Smells like: Dense and smoky — woody, balsamic, and leathery, with animalic and sometimes medicinal edges. Polarizing at full strength, and rarely used neat in Western perfumery.
Steam-distilled rose oil, and the counterpart to rose absolute — the same flower rendered two different ways. Distillation strips out the water-soluble molecules, so otto smells noticeably different from the solvent-extracted version and usually costs more.
Source: Natural. Distilled from Rosa damascena, chiefly in Bulgaria and Turkey. Rose absolute by contrast is solvent-extracted and usually from Rosa centifolia — a different flower and a different process.
Smells like: Green, waxy, and slightly wine-like with a spicy warmth. Less immediately sweet than rose absolute, which reads truer to a fresh-cut flower.
The family of aroma chemicals that carries the violet note, and the backbone of powdery floral accords. Alpha-isomethyl ionone is the family member most people have seen on a label; the wider family runs from bright violet through to dry wood.
Source: Both. Present in natural oils and produced synthetically at scale, with the synthetics dominating in practice. Commodity, many producers.
Smells like: Powdery violet turning woody, with a soft fruity edge — more cosmetic than floral, and the reason so many classic florals smell like a makeup drawer.
The alcohol base of a perfume, cologne, or body spray — high-proof ethanol denatured so it can be sold for fragrance work rather than as a drinkable spirit. A finished eau de parfum is mostly this: the oil is a tenth to a fifth of the bottle and the alcohol is nearly all the rest.
Source: Nature-derived — fermented plant ethanol, then denatured. Commodity, many producers. SDA 40-B is the US formula code for the fragrance-grade version, denatured with tert-butyl alcohol and a bittering agent at levels too low to touch the scent.
Smells like: A sharp, clean spirit bite that flashes off in seconds and leaves the fragrance behind. Anything grainy, sweet, or sour in the alcohol itself will show up in the finished spray, which is why perfume grade is worth the difference. See body spray oils.
The ingredient that lets fragrance oil mix into water instead of floating on top of it — the reason a water-based room spray or body mist can be clear and stay clear. Without one the oil separates, and every spray delivers a different dose than the last.
Source: Man-made. Built from sorbitol and a coconut- or palm-derived fatty acid; a commodity with many producers, also sold under the Tween trade name.
Smells like: Almost nothing — a faint sweet, fatty trace at most. Blend it with the oil first and add the water last; ratios start around one part oil to one part solubilizer, and a cloudy spray usually means too little solubilizer rather than too much oil.
How raw materials are won from nature, and how a formula becomes a drum of oil.
The classic extraction method: steam passes through plant material, carrying volatile molecules into a condenser. The recovered oil is the essential oil; the fragrant water left behind is a hydrosol.
Example: Lavender, peppermint, and most conifer oils are steam distilled.
Mechanical pressing of citrus peels to release their oil — no heat, no solvent. The method behind nearly all citrus oils.
Example: Bergamot oil is expressed from the peel of a bitter orange grown mainly in Calabria.
Using a solvent to pull aromatic compounds from botanicals too delicate for steam. The solvent is removed to leave a waxy concrete, which is refined into an absolute.
Example: Jasmine and tuberose are solvent extracted; heat would destroy them.
The waxy, semi-solid first product of solvent extraction — fragrant plant compounds plus natural waxes. Washed with alcohol to become an absolute.
Example: Rose concrete is a useful material in its own right for solid formats like soap.
The historical method of laying blossoms on purified fat until it absorbs their scent, then washing the fat with alcohol. Beautiful, labor-heavy, and now essentially obsolete outside artisan work.
Example: Enfleurage is how Grasse extracted jasmine and tuberose before modern solvents.
Extraction using carbon dioxide under high pressure ("supercritical CO₂") — the CO₂ acts as a solvent, then simply evaporates away. Yields exceptionally true-to-nature extracts with no solvent residue.
Example: CO₂ extracts of ginger, coffee, and vanilla smell closer to the raw ingredient than their distilled versions.
Two meanings: soaking botanicals in oil or alcohol to draw out their scent (extraction), and the aging of a compounded fragrance so its materials marry (production). Both reward patience.
Example: A freshly compounded fragrance is judged only after maceration — young blends smell unfinished.
The precise weighing and blending of raw materials to a formula — the manufacturing step where a fragrance on paper becomes a fragrance in a drum. Accuracy to fractions of a gram matters at every scale.
Example: A production batch is compounded, quality-checked against the standard, then released.
One production run of a fragrance, identified by a lot number that ties it to its quality records. Batch codes make traceability — and honest quality control — possible.
Example: A Certificate of Analysis is issued per batch, not per product.
Breaking every raw material in a formula down into its chemical constituents for safety documentation — so an SDS reflects everything actually present, including the natural constituents of essential oils. More work, more transparency.
Example: Our SDS documents use full mixture analysis — it makes them look more technical because they say more. See how to read an SDS.
A technology that captures and analyzes the scented air around a living thing — a flower, a forest, a place — so perfumers can reconstruct scents that cannot be extracted.
Example: The scent of lily of the valley in perfumery is a headspace reconstruction; the flower yields no oil.
A company that designs and manufactures fragrance for other businesses — from global firms supplying the world’s biggest brands to specialized suppliers. Perfumers work inside fragrance houses.
Example: Our formulas are produced by one of the largest fragrance manufacturers in the world — a family-owned company in business since 1871, now in its 5th generation.
An aroma molecule developed and used exclusively by one fragrance house, unavailable to competitors. Captives are the industry’s trade secrets and a reason true duplication of great fragrances fails.
Example: A signature effect you cannot place in a famous perfume is often a captive at work.
The standard laboratory method for separating a fragrance into its individual components and identifying each one. It is how a house documents what is actually in a formula, and how a batch gets checked against the reference it is supposed to match.
Example: A batch that smells close but reads differently on the chromatogram gets held — that is quality control catching what a tired nose would miss.
The terms that decide whether your finished product actually works.
The percentage of fragrance oil in a finished product, by weight. Load drives strength, cost, and compliance — and every product type has its own workable range.
Example: Candles typically run 6–10%; fine fragrance 15–30%; lotions far lower. Work it out with our fragrance oil calculator.
The temperature at which a fragrance oil’s vapors can ignite from a spark or flame. A handling and shipping property — not a measure of quality, and not the temperature at which scent "burns off."
Example: Add fragrance to melted wax below the oil’s flashpoint. Full guide: Understanding Flashpoint.
How strongly an unlit candle projects scent at room temperature — what a customer smells on the shelf. Cold throw sells the first candle.
Example: Evaluate cold throw after the candle has fully cured, not the day it is poured.
How well a burning candle fills a room with scent. Driven by the fragrance’s design, the wax, the wick, and the load. Hot throw sells the second candle.
Example: Judge hot throw after two to four hours of burning in a normal-sized room. See common candle problems.
The umbrella term for how far a product projects fragrance into a space — covering both cold and hot throw in candles, and projection generally in home fragrance.
Example: Wax melts, diffusers, and candles are all evaluated on scent throw.
The rest period after production during which fragrance binds into the product matrix — essential in candles and cold process soap. Skipping cure gives false evaluations.
Example: Soy candles typically need one to two weeks of cure before honest throw testing.
A fragrance’s ability to remain unchanged in a product base over time — no fading, shifting, discoloration, or separation. Stability testing simulates months of shelf life before launch.
Example: A fragrance stable in wax may misbehave in a high-surfactant shampoo; test in the actual base.
Color change in a finished product caused by fragrance ingredients — most famously vanillin turning whites brown. Predictable and manageable with the right formula or product design.
Example: A high-vanillin gourmand in white soap will brown; embrace the cream color or choose a low-vanillin formula.
The degradation of fragrance materials by exposure to air, light, and heat — flattening top notes and shifting character. Citrus is most vulnerable.
Example: Store oils tightly sealed, cool, and dark. Full guide: Oxidation & Storage.
A cold process soap fault where fragrance speeds up saponification and the batter thickens too fast to work. Specific fragrance materials (often spice and floral) are known accelerants.
Example: If a batter turns to pudding seconds after adding fragrance, that oil accelerates — check reviews and test small.
A cold process soap fault where fragrance causes rice-grain lumps in the batter. Usually salvageable with a stick blender; caused by specific materials reacting with the base oils.
Example: Ricing shows up moments after adding fragrance — another reason to test one small batch first.
The severe version of acceleration: soap batter solidifies almost instantly into an unworkable mass. Prevention is fragrance selection and testing, not technique.
Example: A seized batch can sometimes be saved as a rustic "hot process" soap — but the design is lost.
The structured testing of a finished candle — full burns, timed sessions, wick evaluation, throw scoring — before a formula and vessel combination goes to market.
Example: A proper burn test runs the candle to the bottom; problems often appear in the second half.
A reference product a new fragrance is evaluated against — a market leader, a previous version, or a target scent profile. Professional evaluation is always comparative.
Example: A brief often names a benchmark: "in the territory of X, but greener and less sweet."
Fragrance engineered to disperse in water-based systems without a solubilizer — for products like linen sprays, cold-air diffusers, and cleaners where standard oils would separate.
Example: See our water-soluble fragrance program for aqueous applications.
Technology that seals fragrance in microscopic shells that break open with friction or moisture, releasing scent on demand — the "fresh laundry days later" effect.
Example: Encapsulated fragrance is why towels release scent when rubbed. See fragrance encapsulation.
Undiluted — fragrance oil evaluated or handled at full concentration. Smelling neat oil from the bottle misleads: volatile materials dominate, and the balance only appears in the finished product.
Example: Never judge an oil neat; put it in your base at your working dosage, then decide.
The pool of liquid wax that forms around a burning wick. Its width and depth are what release scent into the room — hot throw is largely a question of whether the wick builds the right melt pool.
Example: A melt pool reaching the vessel edge within a few hours of burning is the usual burn-test target.
When a candle burns a narrow shaft down the middle and leaves wax clinging to the container wall. Usually a wick-size problem, not a fragrance problem — it often appears after fragrance load was raised without re-testing the wick.
Example: If a candle tunnels after a fragrance change, re-wick before blaming the oil. See common candle problems.
A carbon ball that builds on the tip of the wick as a candle burns. Heavy fragrance loads and certain materials feed it — usually a signal to adjust dosage or wick series, not to abandon the scent.
Example: A mushrooming wick plus soot on the vessel usually means too much load or too large a wick.
Ounces of fragrance oil per pound of wax — the shorthand many candle makers dose by. It is not a percentage: one ounce per pound is roughly 6% of total batch weight, so always check which unit a supplier’s maximum refers to.
Example: Convert PPO to a true percentage — and to exact oil quantities and cost — with our fragrance oil calculator.
Trade shorthand for dosing at roughly one ounce (double) or one and a half ounces (triple) of fragrance per pound of wax. Past a wax’s holding capacity the extra oil does not bind — it sweats out, clouds the surface, and can hurt the burn rather than help the throw.
Example: If throw is weak at 8–10% load, the fix is usually the wick, wax, or cure — not "triple scenting."
Combining more than one scent so they read as a single accord — a consumer habit that has become a range-design strategy. For a brand it is a collection decision: choose oils that share a material or a base so the combinations hold up instead of fighting.
Example: A candle line built for layering might run one musk base under every scent in the collection.
Assigning different scents to different rooms or moments so a home reads as a set of moods rather than one smell. For a home-fragrance line it means building a collection that divides cleanly by space.
Example: A scentscaping brief might ask for a bright citrus for kitchens, green tea for the office, and a soft amber for bedrooms.
Maker shorthand for how a fragrance oil smells neat in the bottle, before it goes into anything. It is a fair first impression and a poor predictor of the finished product — wax, soap, and alcohol each shift the balance.
Example: An oil that reads sharp OOB often lands beautifully in a cured candle. Judge it in your base, not the bottle — see getting the most out of fragrance oils.
Patches where cooling wax has pulled away from the inside of the glass, leaving what looks like a damp shadow. It is trapped air rather than oil — an adhesion issue driven by pour temperature and cooling speed, and it does not affect burn or throw.
Example: Warming the vessels before pouring and letting them cool slowly does more for wet spots than changing fragrance. Full walkthrough: common candle problems.
The white, crystalline film that forms on vegetable-wax candles as the wax settles into its natural crystal structure. It is cosmetic, it returns after burning, and no fragrance choice prevents it outright.
Example: Frosting shows most against dye — one reason many soy makers sell their candles uncolored.
Horizontal ridges on the side of a container candle, left where the wax set in stages instead of cooling as one body. A pour-temperature and cooling problem, not a fragrance one.
Example: If the lines land at the same height every pour, look at pour temperature and how quickly the room is pulling heat out of the glass.
Cavities that open under the surface as wax contracts on cooling, usually around the wick. They form on the way down rather than during a burn, and a second pour or a pass with a heat gun closes them.
Example: Poking relief holes before the wax fully sets keeps the air from getting trapped to begin with.
Wax left clinging to the container wall after a burn, because the melt pool never reached the glass. A thin film is normal and clears over later burns; a thick, persistent ring means the wick is undersized for that wax, vessel, and fragrance load together.
Example: Judge hang-up across a four-hour burn rather than the first hour — most of it corrects itself by the third burn.
Droplets of fragrance oil surfacing on a finished candle or wax melt, because the batch carries more oil than the wax can bind. Load, cure, and storage temperature all feed it, and the fix is dosing to what the wax actually holds.
Example: Beads of oil on a cooled candle mean the load is past capacity — pull it back and re-test throw. Work the numbers with our fragrance oil calculator.
The stage in cold-process soap where the batch heats itself, turns translucent, and sets darker and glossier than it poured. Some fragrance oils generate heat of their own and push a batch into it, which is why one recipe can gel with one scent and not another.
Example: A partial gel — a darker band through the middle of the bar — is a temperature outcome, not a fault in the oil. Insulate or chill consistently and the look repeats.
Translucent, veined streaks through cold-process soap, left where glycerin separated out because the batch ran hot. Fragrance oils that heat or accelerate a batch make rivers more likely, and titanium dioxide makes the ones you get easier to see.
Example: If a scent rivers every time, soap it cooler and discount the water. Oils suited to the format: cold-process soap fragrance oils.
The crystalline, snowflake-like pattern that can appear in a set paraffin candle. Fragrance load is a direct cause — past roughly 10% oil in a mottling-prone wax it shows up on its own — so it is a defect or a design feature depending entirely on what you were aiming for.
Example: Mottling is deliberate in some rustic pillars and unwanted in a glossy container candle; wax and additive choice decide which you get.
A polymer additive for paraffin that binds oil into the wax — improving fragrance and color retention, raising how much oil the wax will hold, and increasing opacity. Grades differ on purpose: some suppress mottling, others are formulated to preserve it.
Example: A common fix when a high fragrance load starts sweating out of paraffin. Dosed in fractions of a percent — more is not better.
How thick or thin a fragrance oil is, and therefore how it behaves in a pump, a filling line, or a pipette. A handling property, not a quality signal — viscosity says nothing about how good or how strong an oil is.
Example: A thick, resin-heavy oil may need gentle warming before it will move through a filling line cleanly.
Marketing terms position; compliance claims substantiate. These are the standards and documents behind real claims.
The International Fragrance Association — the industry’s global self-regulatory body. IFRA publishes enforceable Standards that ban, restrict, or set purity requirements for fragrance materials based on RIFM’s safety science.
Example: Start here: Understanding IFRA Safety Standards.
The Research Institute for Fragrance Materials — the scientific body that tests and assesses fragrance ingredient safety. RIFM’s findings become IFRA’s rules.
Example: When an IFRA limit changes, it is because RIFM’s risk assessment for that material changed.
The rulebook itself, updated in numbered amendments — the 51st Amendment is the current framework. Each amendment revises which materials are restricted and by how much.
Example: Our documentation is issued under IFRA 51. Guide: The IFRA 51st Amendment.
The 12 product categories IFRA uses to set exposure-based limits — from Category 1 (lip products) to Category 12 (candles and non-skin products). Your product’s category determines which maximum applies.
Example: Find yours with the IFRA Category Lookup Tool; a product spanning categories uses the most restrictive.
The document stating a specific fragrance’s maximum safe usage level in each of the 12 categories. It tells you the ceiling — not the recommended dosage, and nothing about how strong the scent will be.
Example: Every one of our product pages includes IFRA documentation; more available via document request.
The highest percentage of a fragrance permitted in a given IFRA category. A safety ceiling based on exposure — performance and best-smelling dosage are separate questions.
Example: An oil might be permitted at 100% in candles but 2.4% in lotion. How limits work: IFRA limits explained.
The globally standardized hazard document for a pure, undiluted material — covering storage, transport, handling, and emergency response. It describes the concentrated oil in the drum, not your finished product.
Example: Hazard codes on an SDS appear even for citrus oils at full strength. Guide: How to Read an SDS.
The standardized H-codes on an SDS (H226 flammable, H317 may cause allergic skin reaction, and so on) under the Globally Harmonized System. They classify the pure material’s hazards at full concentration.
Example: H-codes on a raw oil do not mean your diluted finished product is hazardous — dosage and exposure decide that.
A per-batch quality document confirming a lot was tested against its specification — identity, appearance, density, refractive index, and other parameters. The paper trail behind consistency.
Example: B2B buyers request a CoA with each bulk shipment to verify the batch matches the standard.
The document listing a fragrance’s content of regulated skin allergens, so brands can label finished products correctly. The EU sharply expanded its list in 2023 — from roughly two dozen individually declarable allergens to about eighty. New products must comply from 31 July 2026, with existing stock given until 31 July 2028.
Example: Your label’s "limonene, linalool" line comes from this document. Primer: Fragrance Allergens Explained.
The International Nomenclature of Cosmetic Ingredients — the standardized naming system for cosmetic labels. Fragrance appears as "Parfum" (or "Fragrance"), with regulated allergens listed individually.
Example: US and EU labeling rules differ: US vs. EU labeling.
Substances classified as Carcinogenic, Mutagenic, or toxic to Reproduction — regulated classes formulators screen out. A "CMR-free" statement documents their absence from a formula.
Example: See our CMR-free fragrance oils.
The EU’s chemical regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals) governing substances placed on the European market. Selling into the EU means your supply chain must be REACH-registered.
Example: REACH compliance is a supplier question to settle before an EU launch, not after.
California’s law requiring warnings for products containing listed chemicals above safe-harbor levels. Compliance is documented per formula.
Example: Browse Prop 65–compliant oils — no warning label required.
Carbon-based compounds that evaporate at room temperature — which describes most fragrance materials by definition. VOC regulations (notably in California) cap VOC content in certain product categories like air fresheners and cleaners.
Example: An air care product sold in California must meet CARB VOC limits; your fragrance supplier should know the math.
The international standard defining what counts as a natural aromatic raw material: botanical origin, physical/enzymatic/microbiological processing only. The substantiated way to say "natural fragrance."
Example: "100% plant-based (ISO 9235)" is a compliance claim; plain "natural" is positioning. Guide: Understanding ISO 9235. Browse ISO 9235 oils.
"Clean" alone is a marketing term with no fixed definition. Retailer clean programs — Clean at Sephora, Credo Clean, Target Clean — are compliance claims: defined ingredient-exclusion lists a formula verifiably meets.
Example: We carry oils compliant with Clean at Sephora, Credo Clean, and Target Clean. Explainer: The Science of Clean Fragrance.
A US EPA program certifying that every ingredient in a product — including each fragrance material — meets strict human and environmental safety criteria. One of the most demanding standards a fragrance can meet.
Example: Cleaning brands pursuing the Safer Choice label need Safer Choice–compliant fragrance from the start.
Formulated to minimize allergy risk — in fragrance, meaning designed around the regulated allergen lists. Meaningful when substantiated by an allergen declaration; hollow when it is just a word on a label.
Example: Truly hypoallergenic formulas often avoid natural extracts, since botanicals carry unavoidable allergens.
Able to break down through natural biological processes. As a substantiated fragrance claim, it is tied to standardized test methods and a threshold — ours is documented at over 90% biodegradability.
Example: See biodegradable fragrance oils.
Cruelty-free: no animal testing. Vegan: no animal-derived ingredients (honey, beeswax absolute, milk derivatives, and legacy animalics all disqualify). Related claims, separately documented.
Example: Browse cruelty-free and vegan fragrance oils.
A formula containing no phthalates — the plasticizers once standard as fragrance diluents. Now table stakes for consumer brands, and substantiated per product rather than assumed.
Example: Every oil in our phthalate-free collection documents this claim at the product level.
The Modernization of Cosmetics Regulation Act — the US law that gave the FDA direct oversight of cosmetics, requiring facility registration, product listing, safety substantiation on file, and adverse-event reporting. If you sell a scented personal-care product in the US, MoCRA applies to you.
Example: Your fragrance documentation — SDS, IFRA Certificate, allergen declaration — is part of the safety substantiation MoCRA expects a brand to hold.
The dossier a cosmetic brand must keep for every product sold in the EU or UK — formula, safety assessment, allergen calculations, labeling, and manufacturing detail. Assembling it is the brand’s responsibility; the fragrance paperwork feeds directly into it.
Example: Your supplier’s IFRA Certificate, SDS, and allergen declaration are PIF inputs — gather them via document request.
The safety assessment inside an EU Product Information File, written and signed by a qualified assessor. It evaluates the finished product at its actual use level — not the raw fragrance oil in the drum.
Example: The assessor needs your fragrance dosage and allergen figures, not just the oil’s name — which is exactly what the supplier documents provide.
The EU’s central registration portal, where a cosmetic product must be notified before it goes on sale. Notification is a filing step, not an approval — the safety work still has to exist behind it.
Example: The EU trio arrives together: CPSR written, PIF assembled, CPNP filed — then you can sell.
The method behind IFRA’s limits: pair a material’s sensitization threshold with how much of a product people actually use, and derive a safe concentration for each product category. It is why usage limits are per-category rather than one flat number.
Example: QRA is the reason the same oil can be permitted at 100% in candles but 2.4% in lotion.
The process by which repeated skin contact with a material can train the immune system to react to it later. It is the health endpoint most fragrance restrictions are built around.
Example: Sensitization risk is why limits tighten hardest on leave-on products. Primer: Fragrance Allergens Explained.
Whether a product stays on the skin or is washed away. Leave-on formats — lotion, balm, body oil, fine fragrance — carry tighter fragrance limits and lower allergen-disclosure thresholds than rinse-off formats like wash and shampoo.
Example: A body wash and a lotion using the same oil sit in different IFRA categories — find yours with the IFRA Category Lookup Tool.
Naturally occurring compounds in cold-pressed citrus oils that can make skin react to sunlight. They are why bergamot and lime are capped in leave-on products, and why FCF (furocoumarin-free) grades exist for skin-contact work.
Example: A citrus brief for a body oil should specify FCF citrus materials from the start.
How fast, and under what conditions, fragrance escapes from a microcapsule. Regulators increasingly ask for that release to be measured rather than assumed — a capsule that opens on contact behaves nothing like one that stays sealed.
Example: Newer IFRA standards bring release-kinetics testing to EU-bound encapsulated products. See fragrance encapsulation.
The density of a fragrance oil compared with water, listed on its specification sheet as a number close to 1. It is the figure that converts between weight and volume — an oil at 0.95 fills more volume per pound than one at 1.05, so the same formula measured in milliliters and in grams is not the same formula.
Example: Dose by weight always, and reach for specific gravity only when you need to know what a pound of oil will look like in a container. Our fragrance oil calculator works in weight for that reason.
The three forms an IFRA Standard can take. A prohibition bars a material from fragrance use outright. A restriction caps how much may be used, category by category. A specification sets conditions on the material itself — purity, a trace constituent, an antioxidant requirement — rather than on the dose.
Example: Your certificate tells you which category limit applies; the Standard behind it tells you whether that limit is a cap, a condition, or a ban. See how IFRA limits work.
Two claims that sound alike and are not. Neither is defined in US law, but the industry reading is settled: fragrance-free means nothing was added for scent, essential oils included, while unscented means the product is not meant to smell of anything — and may carry a masking fragrance to get there.
Example: If you use a masking fragrance, “unscented” is the honest claim and “fragrance-free” is not — and the masking oil still belongs in your ingredient list. See US vs. EU labeling.
The named entity that legally owns compliance for a cosmetic sold in the EU or UK. It has to be established in that market, so a US brand exporting appoints one — a distributor, a consultancy, or its own local entity. The Responsible Person keeps the Product Information File, files the market notification (CPNP in the EU, the SCPN service in the UK), and is who the authorities contact.
Example: Selling a scented body oil into the EU means someone in the EU has to hold your paperwork — the IFRA certificate, SDS, and allergen figures we supply are part of what they file.
The vocabulary of actually sourcing fragrance — sampling, ordering, and the projects in between.
A ready-made, professionally designed fragrance available off the shelf — as opposed to a custom fragrance developed for one client. Stock fragrances put professional perfumery within reach without custom timelines or minimums.
Example: It is also our name. We started this company to bring big resources to small brands — a library of original stock fragrances is how.
A fragrance designed from a brief exclusively for one brand — original, ownable, and developed through iterative rounds with a perfumer. The route to a scent nobody else can sell.
Example: See how our custom fragrance design process works, from brief to final formula.
Selling a product manufactured by someone else under your own brand. In fragrance, an existing formula becomes "yours" commercially — distinct from custom design, where the formula itself is created for you.
Example: A hotel launching its own candle line typically private-labels an existing fragrance.
A deliberate imitation of another brand’s fragrance, sold on the resemblance. Common in the market; dupes copy someone else’s creative work and can never be fully faithful — captives and proprietary materials see to that.
Example: We don’t make them. No dupes. No types. No gimmicks — we respect other people’s work too much to copy it.
Industry shorthand for an approximation of a famous scent — "(Brand Name) Type" — signaling an imitation while sidestepping the trademark. A labeling convention for dupes.
Example: A listing for "Santal 33 Type" is a dupe wearing a disclaimer. All of our designs are original.
The smallest quantity a supplier will sell or produce. High MOQs lock small brands out of professional fragrance; low or no minimums open the door.
Example: Our stock library has no minimum order — sample first, scale when ready.
The time between placing an order and receiving it. Stock fragrances ship fast; custom work and very large compounding runs take longer — plan launches around both.
Example: A custom development plus first production run needs months of lead time; a stock oil needs days.
A curated sample kit for evaluating a fragrance library before committing — the professional way to start. Smell broadly, shortlist, then test finalists in your actual product base.
Example: Our Discovery Set is the front door to the library: smell first, buy second.
A small quantity of fragrance oil for evaluation and base testing before a production order. Sampling is not an optional step — it is the step.
Example: Test your shortlisted oils at your working dosage in your actual product. See the Discovery Set.
Fragrance purchased at production quantities — by the pound, gallon, or drum — at volume pricing. The stage after sampling proves the fragrance works in your product.
Example: The classic path: Discovery Set → samples in your base → bulk order for production.
A structured evaluation of fragrances — on blotters, at timed intervals, against benchmarks, ideally with a professional guiding. How buying decisions should get made.
Example: Read about our first live smelling session in Raleigh — five rose materials from $5/kg to $25,500/kg.
Revising an existing fragrance formula — to meet a new IFRA amendment, replace a discontinued material, hit a certification, or adjust performance. Done well, the scent survives; done carelessly, customers notice.
Example: When IFRA restricted oakmoss, every classic chypre on the market was quietly reformulated.
The point in a smelling session where your nose stops registering what is in front of it — receptors habituate within seconds and everything begins to read the same. Different from specific anosmia, where someone cannot smell a particular material at all; plenty of people never register certain musks.
Example: Work through a handful of blotters at a time with real breaks, and smell your own sleeve to reset. Coffee beans are theater — they add another strong smell rather than clearing the last one. A Discovery Set is best evaluated across days, not minutes.
The questions these terms raise most often, answered plainly.
An essential oil is a single botanical extract obtained by distillation or cold pressing — one ingredient, variable by crop and season. A fragrance oil is a complete, professionally designed formula that can combine essential oils, natural isolates, and man-made aroma materials, engineered for performance, stability, and safety in a finished product.
In that oil’s IFRA Certificate, which lists the maximum usage level for each of the 12 IFRA product categories. Every Stock Fragrance product page includes IFRA documentation, and additional documents are available through our document request page. Use the IFRA Category Lookup Tool to identify your product’s category first.
It depends on your product type and its IFRA category. The IFRA Certificate gives the safety ceiling; the best-performing dosage is usually lower and found through testing. Our fragrance oil calculator converts your container size, dosage, and unit count into exact oil quantities and cost.
Those are two different measurements: cold throw is the scent an unlit candle gives off at room temperature, and hot throw is how it fills a room while burning. Wax type, wick, fragrance load, and cure time all affect the two differently, which is why professional testing evaluates both.
Probably — the industry keeps coining them. Send it to us through our contact page and we’ll define it and add it. This page is maintained as a living reference.
Definitions are the start. These tools and guides put the vocabulary to work.
What hazard codes really mean, what an IFRA Certificate does and doesn’t tell you, and how both apply to your finished product.
The science, the safety frameworks, and why origin doesn’t determine safety — the debate behind half the terms in this glossary.
Volatility, concentration, and product base — why the same oil performs differently in perfume, soap, and candles.