Polyhexamethylene biguanide

Polyhexamethylene biguanide (CAS 28757-47-3), commonly known as PHMB, is a polymeric antimicrobial agent used across industrial and consumer markets to control bacterial, fungal, and algal contamination.

It functions as a broad-spectrum biocide effective at low concentrations, making it a preferred active ingredient where persistent antimicrobial performance is required for various industrial applications.

In water treatment, PHMB is used as an alternative to chlorine-based biocides in swimming pools, cooling towers, and process water systems where chlorine compatibility is a concern for operators.

Personal care formulators incorporate it as a preservative in rinse-off and leave-on products including contact lens solutions, wound cleansing preparations, and skin antiseptics for consumer safety.

The textile and leather industries apply PHMB to impart durable antimicrobial finishes to fabrics, nonwovens, and treated surfaces to prevent the growth of odor-causing bacteria and mold.

In industrial and institutional cleaning, it is formulated into hard surface disinfectants and sanitizers targeting healthcare, food processing, and veterinary environments requiring high hygiene standards.

PHMB is supplied as an aqueous solution, most commonly at 20% active concentration. Technical and cosmetic-grade specifications are available depending on the specific requirements of the end application.

Buyers should confirm active content and compliance with relevant regional regulatory listings, including EU Biocidal Products Regulation, when evaluating supply sources for their manufacturing needs.