Phenoxyethanol, Explained: What the EU's 1% Limit Rests On, and Where the French Under-3 Warning Came From
Phenoxyethanol is a frequent "is it safe?" search, and it is in the bottle for a dull reason: water-based creams grow microbes unless something stops them. Regulators have examined it, and the paper trail is public.
What it does in the formula
It is a preservative with a broad antimicrobial spectrum, and a 2019 review in the Journal of the European Academy of Dermatology and Venereology (Dréno and colleagues) notes decades of cosmetic use.
The legal ceiling: 1.0%
In the EU it is entry 29 in Annex V of Regulation (EC) No 1223/2009, the permitted-preservatives list, capped at 1.0% in the finished product. That is a ceiling, not a typical dose.
Where the French warning came from
In September 2012 France's ANSM sent the European Commission a risk assessment recommending 0.4% for products for children under three, and no phenoxyethanol in products for the nappy area. Other member states raised similar concerns, so the Commission asked its scientific committee, the SCCS, whether 1.0% was safe.
How the SCCS tested the 1% limit
The opinion (SCCS/1575/16) was adopted in March 2016 and finalized in October 2016. Its key study was a 90-day dermal study in rabbits. The no-effect level was 500 mg/kg of body weight per day, adjusted to 357 mg/kg for five-days-a-week dosing. The committee's default adult exposure to a 1% product was 2.69 mg/kg per day, giving a margin of safety of 130.
Why the pass mark was 25, not 100
Margins are normally judged against 100. The SCCS cut it to 25 because humans metabolise phenoxyethanol far more efficiently than rabbits. For children up to three, worst-case scenarios gave margins around 50, still above 25. The committee judged 1.0% safe and said that covers newborns and infants.
What skin absorption looks like
In-vitro human skin data showed absorption did not change with concentration: about 37% of the applied dose from a rinse-off product and about 78% from a leave-on one, at 1%. An animal test found no skin sensitisation, though undiluted phenoxyethanol irritated rabbit eyes, which is why the diluted 1% ceiling matters.
What the opinion does not cover
The opinion states it does not account for exposure from sources other than cosmetics. A population-level verdict cannot say whether one person will react to one product. Our irritant vs. allergic reaction guide and patch-test steps matter more than any single ingredient verdict.
Reading the label
It appears as "Phenoxyethanol" in the ingredient list. A water-based cream sold without it holds a different preservative or will not keep; the PAO symbol guide explains opened-jar life.
This article summarizes published regulatory opinions and is not medical advice. Patch test any new product first, and see a dermatologist about any skin reaction or concern.
All content is fact-checked under our editorial standards.