PHENYL METHYL PYRAZOLONE

Restricted CAS: 89-25-8CosIng #36531

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.

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.

Want to know when a cosmetic on your shelf gets recalled?

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