POLYQUATERNIUM-103 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYQUATERNIUM-103

Safety grade: A

This is a synthetic polymer (a chain of molecules linked together) that acts like a thickener and stabilizer in cosmetic products. It helps keep ingredients from separating and makes products feel thicker or creamier.

This ingredient stabilizes emulsions (mixtures of oil and water), makes products look opaque or creamy rather than clear, and controls how thick or thin the product feels when applied.

Graded using: COSING.

Last verified: May 26, 2026