PHENYL MERCURIC BROMIDE is graded A** (Safe) by Expert·ING, based on COSING regulatory data.

PHENYL MERCURIC BROMIDE

Safety grade: A**

This is a mercury-based chemical compound that was historically used to prevent bacterial and fungal growth in cosmetic products. It is no longer commonly used in modern cosmetics due to safety concerns associated with mercury exposure.

It acts as a preservative by killing or inhibiting the growth of microorganisms that could otherwise contaminate and spoil cosmetic products.

Graded using: COSING.

Last verified: May 26, 2026