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

PHTHALIC ANHYDRIDE

Safety grade: A

This synthetic ingredient is used in cosmetics as a binding agent and film-former, helping products adhere to skin and hair while improving their staying power. It's derived from petroleum-based chemicals and works to create a smooth, long-lasting finish in formulations like nail polish and certain makeup products.

Graded using: COSING.

Last verified: June 9, 2026