QUATERNIUM-98 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

QUATERNIUM-98

Safety grade: A

A synthetic conditioning agent derived from plant-based sources, this ingredient works to soften hair and skin by helping products glide smoothly and reducing frizz. It's commonly found in shampoos, conditioners, and styling products to improve texture and manageability.

Graded using: COSING.

Last verified: June 9, 2026