... 3800 to 20,000 daltons. A common method for the synthesis of chitosan is the deacetylation of chitin ... and biodegradable. Purified qualities of chitosans are available for biomedical applications.Chitosan and its derivatives such as trimethylchitosan ... : pharmaceuticals, food, health care, textile , dyeing and printing, leather, coating, tobacco, plastics, cosmetics, feed, color film, paper making ...