Hyaluronic acid has peculiar physical and chemical property and biologic action, widely used in medicine. It can be used as a viscoelastic agent in artificial crystal planting in ocular surgery, as a fill agent in osteoarthritis, also as an agent in eye drops. It has good action of adhesion preventives in surgerical operations and healing cuts on skin. Compound of hyaluronic acid and other drug, the additive can make the action of drug delaying. With the development of medical technology. Hyaluronic acid will be more widely used in medicine. [technical standard] Specification\nameHyaluronic acid (injection grade) CharactersWhite or almost white powder Hyaluronic acid (dry basis)95.0-105.0% 600nm (1?300 )= 0.01 260nm (1?300 )= 0.5 Ph(0.1% water solution)5.0-8.5 Transparency (0.1% solution)= 99% Loss on drying=10.0% Protein= 0.1% Heavy metals (as pb)= 20ppm Chlorides= 0.5% Intrinsic viscosityPractical value Iron= 80ppm Bacteria count= 10cfu/g Bacteria endotoxin=0.05 eu/mg PackingAccording to the request of the customers StorageStored in an airtight container at 2-8 oc ValidityTwo years [package] 100g/bottle. 1kg/foil-bag. 25kg/drum. Or according to the requirements of clients.