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

PHOSPHORUS PENTOXIDE

Safety grade: A

Phosphorus pentoxide is a chemical compound made from phosphorus and oxygen that acts as a drying agent. It's used in cosmetics to help regulate pH levels and prevent unwanted chemical reactions that could damage the product.

This ingredient helps maintain the product's stability by adjusting acidity levels and binding to metal impurities that could otherwise cause the formula to break down or become less effective.

Graded using: COSING.

Last verified: May 26, 2026