QUATERNIUM-90 is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

QUATERNIUM-90

Safety grade: A

Quaternium-90 is a positively charged chemical compound that helps reduce static electricity buildup in hair and skincare products. It works by neutralizing the electrical charge that makes hair frizzy or causes products to cling unexpectedly.

This ingredient is used to prevent static electricity and reduce frizz, making hair smoother and easier to manage while improving the overall feel and performance of cosmetic formulations.

Graded using: COSING, FDA.

Last verified: May 26, 2026