HYDROXYPROPYLTRIMONIUM ASCORBATE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

HYDROXYPROPYLTRIMONIUM ASCORBATE

Safety grade: A

This ingredient is a vitamin C derivative that helps brighten skin and protect it from environmental damage. It's created by chemically modifying vitamin C to make it more stable and easier for skin to absorb, allowing it to work effectively in skincare products.

Graded using: COSING.

Last verified: June 9, 2026