POLYQUATERNIUM-65 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYQUATERNIUM-65

Safety grade: A

A synthetic conditioning agent that helps hair feel smoother and softer while also helping keep cosmetic products from separating. It's a type of polymer—a large molecule made up of many smaller units linked together.

This ingredient conditions hair to make it more manageable and shiny, while also stabilizing emulsions to prevent products from breaking down or separating into layers.

Graded using: COSING.

Last verified: May 26, 2026