Understanding Flashpoint
Updated August 2026
A fragrance oil’s flashpoint is the lowest temperature at which the oil gives off enough vapor to ignite briefly in the presence of an open flame. It is a handling, storage, and shipping specification—not a measure of how a finished candle or lotion will smell. Across the 24 Stock Fragrance safety data sheets on file, measured flashpoints run from 101.4 °F (38.5 °C) to above 212 °F, with a median of 187 °F.
Key Takeaways
- Flashpoint is the lowest temperature at which a fragrance oil’s vapor ignites briefly near an open flame. It is not an auto-ignition temperature.
- It governs handling, storage, and shipping—not hot throw or scent performance in the finished product.
- Stock Fragrance SDS values span 101.4 °F to above 212 °F; 10 of the 24 sheets on file record 200 °F or higher.
- A low flashpoint does not make an oil unsafe. Many citrus materials flash low and are used routinely.
What Is Flashpoint in a Fragrance Oil?
The flashpoint of a fragrance oil is the lowest temperature at which it can emit vapor that ignites momentarily when exposed to an open flame or ignition source. Importantly, this does not mean the fragrance oil will spontaneously catch fire at that temperature. Flashpoint relates to shipping, handling, and manufacturing—not burn performance in finished products.
Flashpoint is listed on each fragrance oil’s SDS. Need documentation? Request SDS & IFRA documentation here.
What Are Typical Fragrance Oil Flashpoints?
There is no single flashpoint for fragrance oils—the value depends on the materials in the formula. The 24 Stock Fragrance safety data sheets on file give a measured picture: flashpoints run from 101.4 °F (38.5 °C) at the low end to above 212 °F at the high end, with a median of 187 °F. Ten of the 24 sheets record 200 °F or higher.
101.4 °F
Lowest on file
187 °F
Median of 24 SDS
10 of 24
At 200 °F or above
| Measured flashpoint | Sheets in range | Values recorded |
|---|---|---|
| Below 150 °F | 6 of 24 | 101.4 °F, 137.1 °F, 144 °F, 145.0 °F, 146.2 °F, 149.7 °F |
| 150–199 °F | 8 of 24 | 153.4 °F, 155.2 °F, 180.4 °F, 180.9 °F, 184.5 °F, 185.7 °F, 189.2 °F, 197.6 °F |
| 200 °F and above | 10 of 24 | 200.2 °F, 200.9 °F, 205.6 °F, plus seven sheets recorded as >212 °F |
Source: Stock Fragrance safety data sheets, Section 9 (physical and chemical properties), August 2026. Each value belongs to one formula and can change when a formula is revised, so always work from the current SDS for the specific oil you are using.
Two things follow from that spread. The set is weighted high—16 of the 24 sheets record a flashpoint above 180 °F—so a low flashpoint is the exception rather than the rule. But the low end reaches down to 101.4 °F, which is why the only number worth working from is the one on that oil’s own safety data sheet.
Flashpoint describes vapour and an ignition source together: the lowest temperature at which an oil emits vapour that ignites momentarily when an open flame is present.
Why Does Flashpoint Matter?
1.
Safety During Handling & Manufacturing
Flashpoint helps users avoid exposing fragrance oils to heat sources that could lead to ignition. Understanding this temperature allows manufacturers to set safe operating parameters and reduce workplace hazards.
2.
Storage & Transportation Compliance
Many transportation regulations—especially for air freight—are based on flashpoint thresholds. Oils below certain flashpoints may be considered flammable for shipping purposes. Knowing the flashpoint ensures correct packaging, labeling, and carrier selection.
3.
Application Suitability
Some applications perform better with specific flashpoint ranges. For example:
| Candles: | The flashpoint should be higher than typical wax melt temperatures to avoid volatility issues. |
| Reed diffusers: | Solvents and flashpoints influence evaporation rate and scent diffusion. |
| Hot-process manufacturing: | Surfactant systems, balms, and emulsions may lose top notes if heated too high. |
Why Do Fragrance Oils Lose Top Notes When Heated?
A fragrance oil is made of many individual materials—each with its own flashpoint and volatility. During heating, the most volatile ingredients evaporate first. This is why:
- Citrus and green notes often fade or disappear in high-heat processes.
- Laundry products lose most low-flashpoint ingredients during the dryer cycle.
- Candles may show reduced top-note brightness if fragrance is added to wax that is too hot.
Understanding volatility helps determine how a fragrance will perform across product categories. Explore fragrances by application: Candle & Home Fragrance Oils • Personal Care Oils • Laundry & Cleaning Oils
How Is Flashpoint Tested?
Flashpoint is measured through controlled laboratory testing using standardized methods:
|
1.
Pensky–Martens Closed Cup (PMCC)A small sample is sealed inside a closed vessel and heated. At set intervals, a flame or spark is introduced. The flashpoint is recorded at the moment vapor ignites briefly. This method simulates real-world conditions where oils are handled in closed containers. |
2.
Tagliabue Open Cup MethodThe sample is heated in an open container while a flame is passed across the surface. This method generally produces higher flashpoint values because vapors can dissipate. |
SDS documentation will specify which method was used, as results vary between testing approaches.
Common Misconceptions
Does flashpoint affect candle hot throw?
No. Flashpoint affects shipping and handling—not scent throw. Hot throw depends on wax, wick, burn pool, and volatility.
Does low flashpoint mean unsafe?
No. Many natural citrus oils have low flashpoints but are used safely. Flashpoint only indicates the temperature at which vapors could ignite with a flame present.
Do all fragrance oils have a low flashpoint?
No. Across the 24 Stock Fragrance safety data sheets on file, 16 record a flashpoint above 180 °F and seven record no flashpoint below 212 °F. The lowest on file is 101.4 °F (38.5 °C).
Does adding fragrance above its flashpoint make it catch fire?
No. Flashpoint is not auto-ignition. Hotter wax may cause evaporation, not ignition. The risk occurs only if an open flame is present.
In Summary
Flashpoint is a critical yet often misunderstood part of fragrance safety. It informs storage, transportation, and manufacturing—but does not determine performance in finished products. By understanding flashpoint and the volatility of fragrance components, brands and creators can ensure safer handling and better product results.
Leave a comment
Comments will be approved before showing up.
Also in Fragrant Thoughts
Getting the Most Out of Your Fragrances
Watch our video interview with Marie Raymos of Humblebee & Me as we discuss how to get the most out of our fragrance oils.
Live Smelling Session: Raleigh, NC
Our first live fragrance smelling session in Raleigh, NC. We explored five rose raw materials — from $5/kg synthetics to $25,500/kg May Rose Essential Oil — then smelled five fragrance oils across candles, lotions, solid perfume, and eau de toilette.
The Science of Clean Fragrance
“Clean fragrance” is everywhere—but rarely defined. This science-based guide explains what clean fragrance actually means, how safety is determined, why natural doesn’t always equal safer, and how IFRA, ISO, EWG, and retailer standards shape modern fragrance formulation.