... industries: textile , dyeing and printing, leather, tobacco, plastics, food additive, fodder, pharmaceutics, color film, paper manufacturing, biological engineering, agriculture protecting and dispose ... ) Chitosan (20000-300000) Chitosan oligosaccharide (1000-10000). Quality index: Item Food grade Chitosan Appearance light yellow powder Deacetylated Degree % ≥85,90, 95 ...