Polyhexamethylene biguanide

Polyhexamethylene biguanide (CAS 32289-58-0), commonly known as PHMB or polyhexanide, is a polymeric antimicrobial agent. Poly(hexamethylenebiguanide) hydrochloride is the most commercially distributed salt form.

Where is Polyhexamethylene biguanide used?

• Healthcare: active ingredient in antiseptic irrigations, wound dressings and contact lens solutions
• Personal care: preservative in shampoos, wipes and skin cleansers
• Textile and leather: durable antimicrobial protection for fabrics, nonwovens and treated surfaces
• Water treatment: microbial control in swimming pools, cooling towers and industrial process water
• It functions as a broad-spectrum biocide and preservative effective against bacteria, fungi and certain viruses at low use concentrations.

Good to know: Buyers should confirm active content, molecular weight distribution and regulatory compliance, including biocidal product regulations and cosmetic approvals for regulated end uses.

Commercial specifications

• Aqueous solution, typically 20% active concentration