PHENACETIN is graded A** (Safe) by Expert·ING, based on COSING regulatory data.

PHENACETIN

Safety grade: A**

Phenacetin is a synthetic chemical compound that was historically used in pain relievers and fever reducers. In cosmetics, it functions as a preservative and stabilizing agent to keep products from breaking down.

Phenacetin acts as a stabilizing agent that helps preserve cosmetic formulations by preventing degradation and extending shelf life.

Graded using: COSING.

Last verified: May 26, 2026

Other Stabilising ingredients