water-soluble chitosan

Water-soluble chitosan is a chemically or enzymatically modified form of the natural biopolymer chitosan that exhibits enhanced solubility in water across a broader pH range compared to native chitosan. Chitosan itself is derived from the deacetylation of chitin and consists of β-(1→4)-linked 2-acetamido-2-deoxy-β-D-glucopyranose and 2-amino-2-deoxy-β-D-glucopyranose units. Water solubility is typically achieved by reducing molecular weight (oligomerization) or introducing hydrophilic functional groups such as carboxymethyl, sulfonic acid, or glycol moieties onto the polymer backbone[4][2]. Water-soluble chitosans retain key properties of native chitosan—biocompatibility, biodegradability, non-toxicity—and are used extensively in pharmaceutical and biomedical applications. These include drug delivery systems (as carriers for controlled release), gene delivery vectors (due to their ability to form polyplexes with nucleic acids), wound healing materials, tissue engineering scaffolds, antimicrobial agents, antioxidants, and anticancer agents[6][8][10][2]. The mechanism of action depends on application but often involves mucoadhesion via electrostatic interactions with mucosal surfaces or cell membranes due to its cationic nature at physiological pH; this enhances retention time for drug delivery and imparts antimicrobial activity through disruption of microbial membranes[4][10]. Developers have created various derivatives—such as O-glycol-chitosan—for improved aqueous solubility at neutral pH. Water-soluble forms can be administered via multiple routes including oral, nasal, ocular, vaginal/buccal/topical/parenteral/transdermal/implantable/injectable formulations[6].

Other names

water soluble chitosanWSCWSChchitosan derivative (water-soluble)O-glycol-chitosan