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

PHENOLSULFONPHTHALEIN

Safety grade: A

Phenolsulfonphthalein is a synthetic chemical compound that helps maintain the pH balance of cosmetic products. It works by preventing products from becoming too acidic or too alkaline.

This ingredient acts as a buffering agent to stabilize and maintain the pH level of cosmetic formulations, ensuring the product remains safe and effective for skin application.

Graded using: COSING.

Last verified: May 26, 2026