PHENYL METHYL PYRAZOLONE
PHENYL METHYL PYRAZOLONE is permitted in cosmetics in the EU with restrictions — Annex III, entry 228 of Regulation (EC) No 1223/2009. Review the conditions of use, permitted concentration and Safety Gate alerts.
Regulatory status as of 2026-08-28 (per the CosIng database).
About the ingredient
3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-phenyl-
EU regulatory status
Annex of Regulation (EC) No 1223/2009: III/228
Source: the European Commission's official CosIng database and Regulation (EC) No 1223/2009 of the European Parliament and of the Council on cosmetic products. How we assess ingredients — full methodology.
- View the entry in the CosIng database (European Commission)
- Open Regulation 1223/2009 in EUR-Lex
- Check the chemical profile in PubChem
Last updated:
Functions in cosmetics
Frequently asked questions
Is PHENYL METHYL PYRAZOLONE safe in cosmetics?
PHENYL METHYL PYRAZOLONE is permitted in cosmetics in the EU, but subject to the conditions set out in Regulation (EC) No 1223/2009 — typically a maximum concentration, product category or a mandatory warning on the packaging. Manufacturers must comply with these limits.
In which annex of Regulation 1223/2009 is PHENYL METHYL PYRAZOLONE listed?
PHENYL METHYL PYRAZOLONE is listed under reference III/228 in the annexes of Regulation (EC) No 1223/2009 on cosmetic products. The first part (Roman numeral) indicates the annex: II – prohibited substances, III – substances restricted by conditions, IV – permitted colorants, V – permitted preservatives, VI – permitted UV filters.
What functions does PHENYL METHYL PYRAZOLONE perform in cosmetics?
According to the European Commission's CosIng database, PHENYL METHYL PYRAZOLONE performs the following functions in cosmetics: HAIR DYEING. Functions are defined in the CosIng glossary and describe the technological role of a substance in the finished product.
Are there Safety Gate alerts concerning PHENYL METHYL PYRAZOLONE?
We found 1 recent alerts in the EU Safety Gate database in which PHENYL METHYL PYRAZOLONE appears in the risk description or on the ingredient list of a recalled cosmetic. The full list and details of each alert are below in the Safety Gate alerts section.
Safety Gate alerts mentioning this ingredient
We found 1 recent EU Safety Gate alerts that mention PHENYL METHYL PYRAZOLONE in the hazard description or ingredient list.