QUATERNIUM-24 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

QUATERNIUM-24

Safety grade: A

Quaternium-24 is a chemically-processed ingredient derived from natural sources that helps keep products fresh and prevents bacterial growth. It also reduces static electricity and helps ingredients mix together smoothly in formulations.

This ingredient works as a preservative and antimicrobial agent to prevent microbial contamination, reduces static buildup in hair and fabrics, and acts as a surfactant to help blend ingredients and improve product texture.

Graded using: COSING.

Last verified: May 26, 2026