Polyquaternium-1

Polyquaternium-1 (CAS 75345-27-6) is a quaternary ammonium polymer supplied under trade names including Polyquad, Onamer M, and Polyquat 1. It carries no assigned E-code. The compound belongs to the polymeric quaternary ammonium class and is registered under EC number 682-227-0.

In ophthalmic and personal care formulations, Polyquaternium-1 functions as a preservative by disrupting microbial cell membranes at low concentrations, making it a standard alternative to benzalkonium chloride in contact lens solutions. In water treatment, it acts as a cationic flocculant, neutralising negatively charged suspended particles to aid clarification. Textile and paper processors also apply it as a surface-conditioning agent to modify substrate charge.

Polyquaternium-1 is available as a sticky solid to solid and is subject to REACH registration requirements for EU supply. Procurement teams should confirm grade specifications, concentration, and counterion purity with the supplier. Standard industrial packaging formats apply; contact our team for current lot availability and documentation.