... 2.40-100mesh 3.molecular weight (20,000-300,000) and Chitosan Oligosaccharide (1,000-8,000). Character: Off-white, innocuous, flavourless ... ), or according to demand. *(1)We can supply high-purity chitosan with deacetylation degree >95%.**(2)The viscosity is determined at ... to the needs.We can provide special molecular weight Chi Chitosan (20,000-300,000) and Chitosan Oligosaccharide (1,000-8,000).