QUATERNIUM-89 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

QUATERNIUM-89

Safety grade: A

Quaternium-89 is a conditioning agent derived from natural plant oils that has been chemically modified to help hair. It works by reducing static electricity and making hair smoother and more manageable.

This ingredient is used in hair care products to eliminate frizz and static while providing conditioning benefits that make hair softer, shinier, and easier to comb.

Graded using: COSING.

Last verified: May 26, 2026