3-ETHYL-2-HYDROXY-4-METHYLCYCLOPENT-2-EN-1-ONE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

3-ETHYL-2-HYDROXY-4-METHYLCYCLOPENT-2-EN-1-ONE

3-Ethyl-4-methylcyclopentenolone

Safety grade: A

This is a synthetic aromatic compound that produces a warm, caramel-like or nutty scent. It is used as a fragrance ingredient to give cosmetic products a pleasant smell.

It is used in cosmetic formulations solely to add or enhance fragrance, contributing a sweet, roasted, or caramel-like scent note to the product.

Graded using: COSING.

Last verified: May 26, 2026