POLYQUATERNIUM-28 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYQUATERNIUM-28

Safety grade: A

This is a synthetic polymer that acts like a lightweight conditioning agent. It helps reduce frizz and static electricity in hair while creating a protective layer on the surface.

It eliminates static charge and creates a smooth, flexible film on hair to reduce frizz, improve manageability, and add shine.

Graded using: COSING.

Last verified: May 26, 2026