Phenylmercuric acetate

Phenylmercuric acetate (CAS 62-38-4), also known by trade names Bufen, Tag 331, Tag HL 331, Contra Creme, and Acetoxyphenylmercury, is an organomercury compound used industrially as a broad-spectrum biocide. It acts by releasing phenylmercury ions that disrupt microbial enzyme systems, inhibiting bacterial and fungal growth at low concentrations.

In textile and leather processing, phenylmercuric acetate functions as a slimicide and preservative, preventing microbial degradation of sizing agents and tanning liquors during production and storage. It has also been applied in coatings and adhesives formulations to suppress mold and bacterial contamination in water-based systems, and historically served as a fungicidal seed dressing in agriculture.

Phenylmercuric acetate is subject to strict regulatory controls under REACH, with use restrictions governed by EU biocidal product regulations. Procurement professionals should verify current authorization status and applicable national restrictions before sourcing. Material is typically handled under controlled conditions with full SDS documentation provided.