Selling Birch Soap: FDA Status, Labels and the IFRA Question

Whether a bar of birch soap is "soap" or a "cosmetic" under US law depends on how it is made and how it is labeled and sold, and the answer decides which agency's rules you follow. Separately, IFRA has no Standard for methyl salicylate, so an IFRA certificate for birch oil has no methyl salicylate number to print. This guide walks the decision, a label checklist, what the EU and UK add, and which documents we can and cannot hand you for our oil. It is a sourced explainer by the shop, not legal advice.

Birch Essential Oil bottle

Birch Essential Oil

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Step 1: decide whether you are selling soap or a cosmetic

FDA draws the line narrowly. A product is "soap" for FDA purposes only when the bulk of its nonvolatile matter is an alkali salt of fatty acids, its detergent action comes from those compounds, and it is "labeled, sold, and represented solely as soap" (FDA, Is It a Cosmetic, a Drug, or Both? (Or Is It Soap?)). True soap is regulated by the Consumer Product Safety Commission, not FDA. A cleansing product that fails any of those tests is a cosmetic under 21 CFR 701.20.

The practical trap is the claim, not the chemistry. FDA says intended use is judged from labeling, websites, advertising and consumer expectation, and that claims about easing aches, relaxing muscles, or helping with sleep or mood are drug claims, not cosmetic ones (FDA, Aromatherapy). A birch bar sold as a muscle soak is making a drug claim, whatever the oil's reputation. FDA also says the word "cosmeceutical" has no meaning under the law. Leave the claims out and describe the scent.

Two edge cases we cannot settle from the sources. A bar sold for shaving, or a bar with added skin-care claims, may or may not meet FDA's "solely as soap" test; that is a question for a regulatory consultant or attorney who handles cosmetic and CPSC matters. And an essential oil being plant-derived changes nothing: FDA says that a plant origin does not keep a material from being regulated as a drug if the intended use is drug use.

Step 2: what changes under each label

Label and compliance basics by product status (US)
ItemTrue soap (CPSC)Cosmetic (FDA)
Identity, maker's name and place of businessRequired on consumer commodities, 15 U.S.C. 1453(a)Same Fair Packaging and Labeling Act rule, enforced by FDA
Net quantityOn the principal display panel, in customary and metric unitsWeight for solids in avoirdupois pounds and ounces; a bar of non-soap cleanser needs a net weight statement (21 CFR 701.13, 701.20)
Ingredient listNo FDA cosmetic list ruleDescending order of predominance; "fragrance" may stand for the scent (21 CFR 701.3)
MoCRA dutiesCosmetic law does not apply to true soap, per FDA's framing; confirm with your consultantAdverse event reporting, safety substantiation, and (unless exempt) registration, listing and GMP
Hazard labelingDepends on whether the product is an FHSA "hazardous substance"Same FHSA question can apply to consumer products

Sources for the table: 15 U.S.C. 1453, 21 CFR 701.3, 21 CFR 701.13 and 21 CFR 701.20. On hazard labeling, the Federal Hazardous Substances Act covers any mixture that is toxic, an irritant or a strong sensitizer if it may cause substantial injury in foreseeable use, including foreseeable ingestion by children (15 U.S.C. 1261). No CPSC statement about methyl salicylate in soap turned up in our research, so whether your bar needs FHSA labeling is a determination for you and your consultant.

MoCRA, the Modernization of Cosmetics Regulation Act of 2022, added serious adverse event reporting, facility registration and product listing, safety substantiation, GMP rules and mandatory recall authority for cosmetics. FDA says it "exempts certain small businesses from GMP, registration, and product listing requirements" (FDA, MoCRA). The exemption is defined by average annual cosmetic sales, so read FDA's current guidance for the threshold. The exemption does not cover products that regularly contact the eye, are injected, are for internal use, or change appearance for more than 24 hours, and the pages we read list exemptions only for those three duties. FDA's own page says the fragrance-allergen labeling rule is still to be established.

Step 3: the methyl salicylate limit has nothing to do with IFRA

IFRA's Standards through the 51st Amendment (January 2024) contain no entry for methyl salicylate, wintergreen oil or sweet birch oil; the only birch entry is for birch wood pyrolysate, which is birch tar (IFRA, 2024). That is an absence finding from the index; check ifrafragrance.org for the current amendment before you rely on it. IFRA puts bar soap in Category 9 (IFRA Guidance, 2023), but a category only matters when a Standard assigns it a number.

An IFRA certificate of conformity is also not something IFRA issues. IFRA's guidance calls it a document "established by the fragrance mixture manufacturer," and says IFRA "is not involved in its preparation and takes on no responsibility" for it. It states category-by-category maximums for a fragrance mixture. For an essential oil used as such, IFRA says the supplier should ensure that constituents which have a Standard do not exceed the limit in the finished product. Methyl salicylate has no Standard, so there is nothing for such a certificate to certify about it. If a supplier does show you a methyl salicylate limit on a certificate, it is that supplier's own.

What does set limits is cosmetic law outside the US. In the EU, soap is a cosmetic, and entry 324 allows 0.06% methyl salicylate in rinse-off skin products and 0.6% in hand wash, with a ban on use in preparations for children under 6 (Regulation (EU) 2023/1545). The substance must be listed in the ingredient list above 0.01% in rinse-off products and 0.001% in leave-on. The same text allows non-compliant products on the EU market until 31 July 2026 and available until 31 July 2028. Great Britain's SI 2025/413 took effect on 30 September 2025 with 0.06% for rinse-off skin products for over-1s and adults and 0.02% for ages 0.5 to 1; stock placed on the market on or before that date could stay on sale until 31 March 2026, a window that has now closed (UK Government, 2025). The EU's scientific committee separately advised safe use for children aged 0.5 to 3 up to 0.02% in hand soap and shower gel, as advice, not law (SCCS/1654/23).

Put that against a normal scent rate. Soap Index gives 0.7 oz per pound of base oils as the standard starting point for fragrance oils (Soap Index, 2026). That is 0.7 / 16 = 4.4% of oil weight. Arithmetic: even if the oils were only half of the batter weight, that is 2.2% of the batter, about 36 times 0.06%. Birch oil is not a fragrance oil to be dosed that way. The dilution chart and the shaving soap piece show the arithmetic in grams. In the US no numeric methyl salicylate cap exists for cosmetics that we could find, which is why a conservative EU/UK-style ceiling is the safest anchor for something you sell.

Step 4: the documents, and what we can provide

Documents a soap seller may ask a birch oil supplier for
DocumentDo we have it?What it does and does not give you
Certificate of analysisYes, published at the COA pageA physical-constants certificate: appearance, relative density 1.183, refractive index 1.537, optically inactive. No methyl salicylate percentage, no GC-MS chromatogram, no isotope result, no laboratory name.
Methyl salicylate figure for a lotOwner states it is measured for every batch and sent on requestRequest it with the lot reference printed on the bottle, through our contact page. It is the number your own safety calculation needs.
Isotope and profile workOwner states it is part of per-batch independent analysisNot on the published COA. Ask what you can have for your lot; we do not name the laboratory.
IFRA certificateNo, none on fileSee Step 3: for methyl salicylate it would have no limit to state.
Safety data sheetNot published on the siteAsk before ordering; for the sections to expect, see how to read a birch oil SDS.

For anything beyond the COA, the site's line is: contact us before ordering and we will tell you what we can provide. That is a real limit, so plan for it.

Be clear about what the COA can prove. The USP monograph gives a specific gravity of 1.180 to 1.185 for synthetic methyl salicylate and 1.176 to 1.182 for the natural variety, and says synthetic methyl salicylate and that from Betula are both optically inactive (USP 32-NF 27, mirror). Our COA's 1.183 sits inside the synthetic range and just above the natural one, and the other constants cannot separate the two. So the COA is consistent with genuine oil and cannot prove it. A methyl salicylate percentage, marker compounds by GC-MS and isotope testing are what would, and the owner states those are done per batch. One more distinction: our still page mentions isotope and profile work while the downloadable COA does not contain it, which is why you should ask for the lot figures instead of relying on the PDF. The lab report guide explains how to read each field.

Where this stops

Do not rely on this page for your product. Which rules apply depends on your formula, claims, markets and size, and rules have been changing: the EU label deadlines above, the UK rule in force since September 2025, and FDA's pending fragrance-allergen rule. Hire a regulatory consultant or an attorney who works with cosmetic and consumer-product law, and a cosmetic chemist for the safety substantiation file. Nothing here is individual medical advice, and none of it has had a clinician or lawyer review.

If you plan to scent soap at volume, our bulk sizes start at 5 lb, and the lot reference on the bottle ties your batch to its analysis. Ask for the methyl salicylate figure before you finalize a label, and see the bulk buying guide for how orders work. Our soap making guide covers the process side.

Birch Essential Oil bottle

Birch Essential Oil

Birch Essential Oil from our own shop, in sizes from 1 oz to bulk.

From $15.99

Shop Now →

Sources & Further Reading