QUATERNIUM-18 is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.
QUATERNIUM-18
Safety grade: A
Quaternium-18 is a positively charged chemical compound that helps reduce static electricity and adds moisture to hair. It's a type of conditioning agent commonly found in hair care products.
This ingredient reduces frizz and static in hair, improves softness and shine, helps detangle, and keeps hair conditioned and manageable.
Graded using: COSING, FDA.
Last verified: May 26, 2026
Other Surfactant ingredients
- COCAMIDOPROPYL BETAINE — Grade A
- SODIUM LAURETH SULFATE — Grade C
- XANTHAN GUM — Grade A
- CETEARYL ALCOHOL — Grade A
- CETYL ALCOHOL — Grade A
- STEARIC ACID — Grade A
- SODIUM LAURYL SULFATE — Grade C**
- COCO-GLUCOSIDE — Grade A