Polyhexamethylene guanidine

Polyhexamethylene guanidine (CAS 31961-54-3), also known commercially as Polisept, is a cationic polymeric biocide effective against a broad spectrum of bacteria, fungi, and algae.

It functions as both a preservative and a coagulant-flocculant, giving formulators and process engineers a single active ingredient that addresses microbial control and particle aggregation simultaneously.

In water treatment, it is dosed to disinfect potable and process water while simultaneously flocculating suspended solids, reducing the need for separate treatment chemicals.

Personal care and cosmetics manufacturers incorporate it as a preservative in rinse-off and leave-on formulations where low irritation potential is a key selection criterion for the industry.

Textile and leather processors apply it to impart durable antimicrobial finishes to fabrics and hides, extending product shelf life and meeting hygiene standards across various global markets.

Industrial and household cleaning products use it as the active biocidal component in surface disinfectants and sanitizing concentrates for both commercial and residential maintenance applications.

The product is supplied primarily as an aqueous solution, with active content concentrations typically ranging from 20% to 25% depending on the specific requirements of the end user.

Technical and industrial grades are the most commonly traded forms. Buyers sourcing for personal care or pharmaceutical end uses should confirm grade documentation and impurity profiles with the supplier.