| abstract |
The present invention relates to a process for preparing a low endotoxic alkaline chitosan, a chitin, a chitosan derivative or a chitin derivative, and also to a method for producing a low endotoxin neutral chitosan, a chitosan salt and a chitosan derivative, and the products of such methods. The method comprises contacting an alkaline solution with chitosan, chitin, chitosan derivatives or chitin derivatives to form a mixture; Maintaining the mixture for a period of less than 1 hour, and optionally drying the mixture. The low endotoxin alkaline chitosan will be used in the manufacture of other useful chitosan-based products. |