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.

It is used across industrial and commercial sectors where durable, low-toxicity disinfection is required. In water treatment, PHMG is applied as an algaecide and bactericide in cooling towers.

It remains active at low concentrations in swimming pools and industrial process water systems. Personal care and cosmetics formulators incorporate it as a preservative in rinse-off and leave-on products.

This includes hand sanitizers and surface disinfectants. The textile and leather industries use PHMG to impart antimicrobial finishing to fabrics and hides, protecting against odor-causing bacteria.

It also prevents mold during storage and end use. In food processing environments, it is used as a surface sanitizer for equipment and facility disinfection where residue profile is a key consideration.

Compatibility with food-contact materials is essential for procurement. PHMG hydrochloride is typically supplied as an aqueous solution, with active concentrations commonly ranging from 20% to 25%.

Technical and industrial grades are the standard market offering, with specifications defined by active content and molecular weight distribution. Bulk liquid supply is the norm for industrial buyers.

Product is typically distributed in IBC containers or drums. These formats ensure efficient handling and storage for large-scale manufacturing and water treatment applications across various global regions.