... . Appearance: white powder 2. Specifications: 85%,90%,95% Degree of Deacetylation 3. Test Method ... Deacetylchitin; Poly-(D)glucosamine Appearance: white powderSpecifications: 85%,90%,95% Degree of Deacetylation Test Method: HPLC ChemSpider ... flake or powderDegree of Deacetylation, %≥85,90, 95≥85, 90, 95≥80, 85, 90pH7.0-8 ... 10≤10 Arsenic, ppm≤0.5≤0.5 Total Plate Count, cfu/g≤1000≤1000 Yeast, ...