QUATERNIUM-16 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

QUATERNIUM-16

Safety grade: A

A synthetic conditioning agent that reduces static electricity and frizz in hair. It works by coating the hair surface to make it smoother and easier to manage.

This ingredient reduces static cling in hair and provides conditioning benefits by smoothing the hair cuticle and improving manageability.

Graded using: COSING.

Last verified: May 26, 2026