Can you use essential oils in candles?
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Yes. Wax makers write their instructions for both: CandleScience's SimplySoy directions say to "Add fragrance or essential oil and stir for two minutes" [1], so the wax's own temperatures and maximum load apply to an essential oil exactly as they do to a fragrance oil. What changes is everything around the oil. Essential oils usually cost more per candle, their documents differ because IFRA certificates are written for blends rather than single raw materials, some have low flash points that affect shipping, and the health benefits often attached to them are claims you should not put on a candle. This page covers each of those, with the figures named sources give.
Essential oil and fragrance oil side by side
| Question | Fragrance oil | Essential oil |
|---|---|---|
| What it is | A blend made for a use, often of synthetic and natural materials | A single oil distilled or pressed from a plant, or a blend of such oils |
| How much to add | Within the wax's published maximum and the oil's IFRA limit | The same: the wax's maximum applies [1], and any IFRA limit the seller documents |
| IFRA document | A certificate is expected; IFRA describes it as a document made by companies that create fragrance mixtures [2] | Often no certificate, since IFRA says there is "typically no 'IFRA Certificate' for raw materials" [2]; some sellers publish IFRA usage information instead |
| Flash point | Varies; many candle oils are sold above 141°F, and one supplier states all of its oils are [3] | Varies widely by oil; low for some citrus and eucalyptus oils by one seller's account [4] |
| Throw | Built for candles | One seller says fragrance oils "typically have stronger hot throws and more predictable behaviour in wax" [4] |
| Cost | Lower per ounce at bulk prices (see the cost section) | Usually higher, and very variable by plant |
| Claims | Scent description | Scent description only; health or mood claims raise legal questions (see below) |
How much essential oil to add
Start from your wax. If its data sheet gives a maximum load, that is your wax ceiling for any oil you add. SimplySoy's is 10 percent, or 1.6 oz per pound, in containers [1]. Then look for a limit on the oil itself.
Where IFRA fits for a single oil
The IFRA Standards are the fragrance industry's limits on fragrance ingredients, set as bans, maximum amounts or purity conditions [5]. IFRA expresses each limit as a concentration "in the finished consumer product" [5]. For a blended fragrance oil, the supplier does that arithmetic and prints the result on an IFRA certificate. A single essential oil sold on its own is a raw material, and IFRA itself notes there is typically no certificate for raw materials [2], so what you receive depends on the seller. Village Craft & Candle's listing for its French lavender 40/42 essential oil, for example, carries a link labeled "USAGE & SAFETY - IFRA | SDS" [6]. Ask the seller for that document for every essential oil you plan to sell in a candle, and use the candle category figure on it. If the seller has nothing, you cannot show that the candle conforms to the IFRA Standards, which matters if a retailer asks. IFRA certificates and fragrance limits explains the categories and how to read the limits.
Turning the limit into a weight
Work in percent of the finished candle when you compare against an IFRA figure, and in whatever basis your wax sheet uses when you compare against the wax limit. How much fragrance oil to use has the conversion table and two worked examples.
Flash point, temperature and the advice that conflicts
An essential oil's flash point is the temperature at which its vapor can briefly ignite near a flame or spark [7]. It varies a great deal by plant. Village Craft & Candle lists its French lavender 40/42 at 172°F (78°C) [6], and its essential oil article describes citrus and eucalyptus oils as having low flash points [4].
That same article tells you to add essential oils "once your wax has cooled to approximately 10 degrees below the oil's flash point," on the grounds that oil added above its flash point evaporates before the candle sets and throws less [4]. Other suppliers say the opposite. CandleScience states that "Adding fragrance oil or essential oil to wax above the oil's flashpoint will not cause it to combust," and that fragrance added and poured promptly keeps its strength [3]. Northwood says adding fragrance oil to wax hotter than its flash point "won't affect how strong your candle smells" [8]. Supplies for Candles explains that ignition needs a true ignition source such as a naked flame [7].
This page follows CandleScience, Northwood and Supplies for Candles, and the wax makers' own addition temperatures. Flash point describes when vapor can catch a flame; it was not designed as a measure of scent loss in a pitcher of wax, and the wax makers who publish an addition temperature do so for their wax with no flash point condition attached. What the advice does get right is that holding fragranced wax hot for a long time is a poor idea. CandleScience advises against repeatedly cooling and reheating fragranced wax and suggests sizing batches so you can pour right away [3]. Add the oil at your wax's published temperature, stir as directed, and pour.
Where an essential oil's flash point does matter is shipping and storage. Under the definitions in USPS Publication 52, a liquid with a flash point of 140°F (60°C) or below is a flammable liquid, and one above 140°F and below 200°F (93°C) is a combustible liquid, each with its own mailing rules [9]. A 172°F lavender oil falls in the combustible band. The rules, and where to find the figure on a safety data sheet, are on what a fragrance oil's flash point means.
Cost per candle
Essential oil is often the most expensive line in an essential oil candle, so price it before you design the product. Two listings, both read October 22, 2026, show the spread:
- AFI-USA sells one of its fragrance oil blends at $10.00 for a 1 oz sample and $18.00 a pound at 15 lb [10]. At 1 oz of oil per pound of wax, the oil for a 1 lb batch costs $10.00 from the sample bottle and about $1.13 at the 15 lb price ($18.00 ÷ 16).
- Village Craft & Candle listed its 100 ml French lavender 40/42 at $26.99, shown as sold out [6].
Essential oils are often priced by volume and dosed by weight, so you need the oil's density to compare. Section 9 of the oil's safety data sheet gives relative density or specific gravity, which is close to grams per milliliter. The arithmetic: grams per bottle = milliliters × relative density; cost per gram = price ÷ grams; oil cost per candle = grams of oil in the candle × cost per gram. As an illustration only, if an oil's sheet gave a relative density of 0.90, a 100 ml bottle would hold 90 g, and at $26.99 that is 30 cents a gram. A candle carrying 20 g of that oil would have $6.00 of oil in it before wax, wick or jar. Use the density on your own oil's sheet.
The price of a candle built on that number is worked out on how to price a candle.
Throw, and why to test longer
Expect to test more essential oil candles than fragrance oil candles before one passes. Village Craft & Candle's article says citrus oils fade quickly and can discolor some waxes, and calls essential oils more volatile than fragrance oils [4]. Make test candles at your chosen load, check cold throw after the cure your wax's supplier gives, then check hot throw in a closed room of realistic size. If the scent fades over a few weeks on the shelf, a stronger first sniff will not fix it; that is a choice of oil, and sometimes of blend. A candle that does not smell works through the causes in order.
What you may and may not claim
Describe the scent. Avoid telling customers what the candle will do for their body or mind. Village Craft & Candle's own article, after listing the moods often associated with lavender, eucalyptus, peppermint and cedarwood, cautions that "candle makers need to be careful about making therapeutic claims" [4]. A claim that a candle treats, relieves or prevents a condition can change which rules apply to the product, and "pure," "natural" and "100%" claims must be true of the whole candle, not only the oil. The rules, with their sources, are on what you can claim about your candle.
Safe wording names the oil and the scent: "scented with lavender essential oil" is a factual statement if it is true; "relaxing lavender for better sleep" is a claim about effect.
Handling essential oils
Essential oils are concentrated chemicals with their own hazards. Read each oil's safety data sheet before you open it. An oil classed as a skin sensitizer can cause an allergic skin reaction; the fragrance oil SDS used as an example on reading a fragrance oil safety data sheet carries that warning and asks for protective gloves and eye protection [11]. Store the oils cool and dark with their caps tight, as the SDS directs. Poison Control advises keeping essential oils locked up, out of the sight and reach of children and pets, and treats breathing trouble after an exposure as a medical emergency; for any swallowing or exposure, call Poison Control at 1-800-222-1222, which it says is free, confidential and available 24 hours a day [12].
Before you sell an essential oil candle
If you plan to sell an essential oil candle, the claims question decides more about the product than the oil does. Read what you can claim about your candle next, then get the IFRA documents for each oil and read them with IFRA certificates and fragrance limits.
References
- CandleScience, CandleScience SimplySoy Artisan Wax (product page with instructions and applications), undated, read October 22, 2026. https://www.candlescience.com/wax/candlescience-simplysoy-artisan-wax
- IFRA, Certification of IFRA Standards, undated (copyright 2026), read October 22, 2026. https://ifrafragrance.org/initiatives-positions/safe-use-fragrance-science/ifra-standards/certification-of-ifra-standards
- CandleScience Support, What does the fragrance flashpoint mean?, updated May 1, 2026. https://support.candlescience.com/en_us/what-does-the-fragrance-flashpoint-mean-H1whhmgsZl
- Village Craft & Candle, Candle Making Essential Oil: The Complete Guide to Natural Scenting, June 26, 2026. https://villagecraftandcandle.com/blogs/news/candle-making-essential-oil
- IFRA, Understanding the Standards, undated (copyright 2026), read October 22, 2026. https://ifrafragrance.org/understanding-standards
- Village Craft & Candle, Lavender 40/42 France Essential Oil (product page), read October 22, 2026. https://villagecraftandcandle.com/products/lavender-4042-essential-oil
- Supplies for Candles, Flash Points Explained, published May 7, 2021, modified September 2, 2026. https://www.suppliesforcandles.co.uk/flash-points-explained/
- Northwood, What is a flash point?, undated, read October 22, 2026. https://northwood-knowledge.groovehq.com/help/what-is-a-flash-point
- United States Postal Service, Publication 52, Hazardous, Restricted, and Perishable Mail, section 343 Flammable and Combustible Liquids, undated page, read October 22, 2026. https://pe.usps.com/TEXT/pub52/pub52c3_022.htm
- AFI-USA, Compare to aroma RITUAL by AFI, F49712 (product page with IFRA levels and prices), read October 22, 2026. https://www.afi-usa.com/shop/fragrance-oils/F49712/compare-to-aroma-ritual-by-afi
- AFI-USA, Safety Data Sheet F67142 (fragrance oil), version 3, issue date August 11, 2026. https://www.afi-usa.com/F2/Reports/pdf/REPORT_SDS_F67142.pdf
- Poison Control (National Capital Poison Center), Essential oils: Poisonous when misused, undated (© 2012-2026), read October 22, 2026. https://www.poison.org/articles/essential-oils
