QUATERNIUM-8 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

QUATERNIUM-8

Safety grade: A

Quaternium-8 is a synthetic chemical compound that acts as a preservative and conditioning agent. It helps keep products fresh, prevents static electricity in hair, and makes hair smoother and softer.

This ingredient is used to protect cosmetic products from bacterial and fungal growth, reduce frizz and static in hair, and provide conditioning benefits that improve hair manageability and softness.

Graded using: COSING.

Last verified: May 26, 2026