Polyhexamethylene guanidine hydrochloride

Polyhexamethylene guanidine hydrochloride (CAS 57028-96-3), commonly known as PHMG, is a polymeric biocide with broad-spectrum antimicrobial activity against bacteria, fungi, and algae.

Where is Polyhexamethylene guanidine hydrochloride used?

• Water treatment: algaecide and bactericide in cooling towers
• Swimming pools and industrial process water systems: active at low concentrations
• Personal care and cosmetics: preservative in rinse-off and leave-on products, including hand sanitizers and surface disinfectants
• Textile and leather: antimicrobial finishing for fabrics and hides, protecting against odor-causing bacteria and preventing mold during storage and end use
• Food processing environments: surface sanitizer for equipment and facility disinfection
• It imparts antimicrobial finishing to fabrics and hides.

Good to know: Compatibility with food-contact materials is essential for procurement. Specifications are defined by active content and molecular weight distribution.

Commercial specifications

• Active concentrations commonly 20% to 25%
• IBC containers or drums