QUATERNIUM-77 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

QUATERNIUM-77

Safety grade: A

Quaternium-77 is a type of conditioning agent that's added to hair care products to make hair smoother and easier to manage. It works by coating the hair and reducing static electricity that causes frizz and flyaways.

This ingredient conditions hair by coating the hair shaft to improve softness and manageability while reducing static electricity buildup that causes frizz.

Graded using: COSING.

Last verified: May 26, 2026