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

BUTYLPHTHALIMIDE

Safety grade: A

Butylphthalimide is a synthetic chemical compound that helps cosmetic products stay flexible and smooth on the skin. It's commonly used in nail polishes and other formulations to prevent cracking and maintain a soft texture.

This ingredient acts as a plasticizer to keep cosmetic products flexible and pliable while also conditioning the skin to feel soft and supple.

Graded using: COSING, FDA.

Last verified: May 26, 2026