POLYPROPANEDIOL-2 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYPROPANEDIOL-2

Safety grade: A

This moisturizing ingredient is a type of humectant that helps cosmetic products absorb water and retain moisture on your skin. It's commonly used in lotions, serums, and makeup to keep products smooth and spreadable while helping your skin stay hydrated throughout the day.

Graded using: COSING.

Last verified: June 9, 2026