POLYQUATERNIUM-73 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYQUATERNIUM-73

Safety grade: A

A synthetic polymer that acts like a lightweight conditioning agent for hair. It helps reduce frizz, adds shine, and makes hair easier to style by creating a protective layer on the hair surface.

This ingredient conditions and protects hair by reducing static electricity, forming a thin film that seals moisture in, and helping hair stay in place longer after styling.

Graded using: COSING.

Last verified: May 26, 2026