POLYQUATERNIUM-78 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYQUATERNIUM-78

Safety grade: A

A synthetic polymer that acts like a cleanup agent and smoothing conditioner for hair and skin. It helps products mix together better and leaves hair feeling softer and more manageable.

This ingredient cleanses impurities, helps blend different product ingredients together, and coats hair strands to reduce frizz and improve shine and softness.

Graded using: COSING.

Last verified: May 26, 2026