Eugenol Safety and Compliance for Makers: Questions to Ask

"Is eugenol compliant?" is a badly formed question, because the same drop of eugenol is regulated differently depending on what you put it in. Under the IFRA Standard, a candle, a bar of soap, a perfume and a reed diffuser fall into four different categories, and the numeric limits across the Standard run from 0.14% to 18% of the finished product, with one category carrying no limit at all. This guide sorts out which rule applies to which product, what is law and what is industry code, and what to ask your supplier for. It gives limits only where we read them in the official document, and it is not legal advice.

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Eugenol is restricted, not banned, and the reason is sensitisation

The IFRA Standard on eugenol (CAS 97-53-0) in the 51st Amendment is classed "Restriction", and the document names the endpoints driving it: dermal sensitization and systemic toxicity (IFRA Standards, 51st Amendment, pp. 103-105). Sensitisation means a person can become allergic, after which very small exposures can trigger a reaction. The European Commission's own regulation puts it in those terms: once someone is sensitised, "a much lower concentration" is enough to cause symptoms, and it estimates 1 to 9% of the EU population is allergic to fragrance allergens (Commission Regulation (EU) 2023/1545, recital 2).

How strong a sensitiser is eugenol? The EU's scientific committee tabled mouse lymph node assay results in 2012: an EC3 of 5.3% for eugenol against 0.54% for isoeugenol, and a lower EC3 means a stronger sensitiser (SCCS/1459/11, 2012). On that assay eugenol is roughly ten times weaker than its isomer, which is why the two are handled so differently. It is still on the committee's List A of the most frequently reported, well-recognised fragrance contact allergens. That is a mouse assay on the isolated chemical, so it ranks potency; it does not predict your customer's skin.

Our own pages say the same thing in plain words: eugenol is a recognised skin sensitiser, it is concentrated, wash your hands after handling, keep it from eyes, children and pets, and it is not for internal use. We make no medical claims and do not offer it for dental or therapeutic use.

Three separate layers, often confused

Law. In the EU, eugenol is entry 71 of Annex III to the Cosmetics Regulation (EC) No 1223/2009 (as published in 2009), and its presence must be shown in the ingredient list above 0.001% in leave-on and 0.01% in rinse-off products. The detail, including what has and has not changed since, is in our allergen labelling article. In the US, the cosmetics law (MoCRA, 2022) already requires contact details on labels and adverse-event reporting, but its fragrance-allergen list does not exist yet.

Industry code. IFRA's Standards are mandatory for IFRA members, according to IFRA's notification of the 51st Amendment (IFRA, 2023). If you are not a member they are not binding on you as such, but they are the yardstick your fragrance supplier writes certificates against. IFRA's Guidance says observing the Standards is "necessary for compliance with the IFRA Code of Practice but may not be sufficient to ensure regulatory compliance" (IFRA Guidance, 51st Amendment, 2023). So "IFRA compliant" never equals "legal". The category-by-category numbers are in the IFRA explainer.

Hazard communication. This is the safety data sheet and the GHS label. PubChem's aggregation of ECHA classification notifications for eugenol (2,820 reports) shows H317, "may cause an allergic skin reaction", in 99.8% of them, with eye irritation in 80.4% (PubChem, eugenol GHS classification). Those are company notifications, and the page we read did not show whether an EU-wide harmonised classification exists, so your supplier's SDS is the document that governs. In the US, OSHA's Hazard Communication Standard requires manufacturers and importers to obtain or develop an SDS for each hazardous chemical, and employers to keep one in the workplace (29 CFR 1910.1200(g)). Cosmetics packaged for retail sale are excluded from that rule, but the neat eugenol on your bench is not a packaged cosmetic. HazCom is a workplace rule, so whether it reaches your particular setup is a question for an industrial hygienist. For how to read the document, see our SDS reading guide.

One of our own gaps belongs here: our site does not publish an IFRA certificate or an SDS. Ask any supplier, us included, for both before relying on a limit quoted in an article.

The questions to ask, by product

The categories below are IFRA's own placement of each product type (Guidance Table 12); the limits are from the eugenol Standard. Both are the 51st Amendment, which was current when we read it. Borderline products need IFRA's category guidance or a regulatory specialist, not a guess.

ProductIFRA categoryEugenol limit, finished productAsk
Candle (all types)12No restrictionNot a cosmetic, so no cosmetic labelling. What does the fragrance SDS say about hazard labelling and flash point?
Bar soap94.9%Is it a cosmetic where you sell? If so, ingredient list and the rinse-off allergen threshold apply.
Fine fragrance42.5%Leave-on threshold applies; does any other ingredient add eugenol (clove or cinnamon leaf oil)?
Body oil or lotion5A0.64%Which number does your own copy quote, and does it match?
Reed diffuser, pot-pourri refresh oil10A4.0%IFRA put these in 10A on purpose, because soaked reeds are handled by hand.
Room or linen spray, manual10B18%Spray means inhalation and some skin contact; ask what the SDS says about ventilation.

Three details make that table less simple than it looks. First, the limits apply to the finished product, not to the neat oil or to your concentrate, so you must convert (worked in the explainer). Second, the Guidance says indirect contributions count: eugenol carried in by a natural oil such as clove or cinnamon leaf is added into the calculation, and an analysed level beats the indicative one. Third, the implementation dates in the Standard, 30 March 2024 for new creations and 30 October 2025 for existing ones, apply to the supply of fragrance mixtures, not to finished products already on shelves.

Which half percent?

Our shop copy says to dilute 0.5% to 2% in a carrier for skin use. Our How We Test page says standard fragrance-industry guidance puts the ceiling "around half a percent" in leave-on products. These do not agree with each other, and neither matches the Standard as a whole. Reading the 51st Amendment: lip products (Category 1) 0.45%, body creams and oils (5A) 0.64%, underarm products (2) 0.14%, fine fragrance (4) 2.5%. A 2% eugenol body oil would exceed the 5A figure by more than three times. The half-percent figure also appears in the old IFRA values the EU's committee tabled in 2012 for perfume and hand cream (0.5%), which were calculated before the current QRA2 method. Reasoning from those two documents, the half-percent line looks like a pre-2020 number carried forward, but we cannot confirm where our page got it. Until a regulatory specialist says otherwise, use the lower figure for any leave-on skin product, and always read the category row, not the shop text.

Methyl eugenol and the paperwork

Methyl eugenol is a separate restricted material with far tighter limits: 0.011% in fine fragrance, 0.0017% in bar soap and 0.066% even in Category 12 (IFRA Standard, Methyl eugenol, 51st Amendment). To do that arithmetic you need an analysis that reports it. The COA we publish is a one-page certificate for one batch and lists physical parameters (relative density, refractive index) with no assay, chromatogram or impurity data, so ask for a GC report from any supplier and check what it says about related phenols. More in eugenol versus methyl eugenol.

What is moving

Who to ask

A regulatory specialist or cosmetic attorney decides what applies to your product and market. A cosmetic chemist or toxicologist handles the exposure arithmetic when a formula has several eugenol sources. An industrial hygienist is the person for workplace handling of the neat material. For a child or pet exposed to a candle, diffuser or spill, call a physician, poison control or a veterinarian; our pets article covers what we can and cannot say.

We sell one material, eugenol oil, undiluted, so the category, the dilution and the paperwork are yours to work out, and the sources below are where to start.

Eugenol Oil bottle

Eugenol Oil

Eugenol Oil from our own shop, in sizes from 0.5 oz to bulk.

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Sources & Further Reading