POLYQUATERNIUM-17 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYQUATERNIUM-17

Safety grade: A

This is a lightweight conditioning polymer that's commonly used in hair and skincare products. It works by forming a protective layer on the surface of hair or skin to smooth and protect it.

Polyquaternium-17 reduces static electricity in hair and creates a thin protective film that improves texture, shine, and manageability while preventing frizz.

Graded using: COSING.

Last verified: May 26, 2026