Crab contains 40% protein, 30% calcium, 30% of chitin. Chitin extraction process is: first with dilute sodium hydroxide solution to remove protein chitin sale, then, with hydrochloric acid to remove the calcium, and the rest is chitin. For removal of the acetyl group in chitin chitin from these specifications, the high temperature for a long time, so that the reaction occurs in a concentrated sodium hydroxide, containing an amino group can be prepared chitin (chitosan or chitosan) . After deacetylation to chitosan after it dissolved in acid and body fluids, can be used by the body. 1823. A French scientist A.Odier also isolated from crustacean insect wings in the same material chitin purchase, he thinks this is a new type of cellulose material, the mission called Chitin. In 1843, France's A.Payen Chitin and cellulose found in nature is not the same. In the same year, Frenchman JL Lassaigne found Chitin contains nitrogen, thus proving Chitin is not cellulose, but a new compound has fiber properties. In 1878, G.Ledderhose detected glucosamine and acetic acid from the hydrolysis reaction in solution Chitin; 1894, E.Gilson further evidence Chitin contains glucosamine, but subsequent studies indicated that, Chitin is glucose from N- acetylglucosamine polycondensation, or the monomer composition Chitin is N- acetylglucosamine. Chitin From 1811 to study clearly found its structure before and after almost took nearly 100 years. Chitin manufacturers _ _ Anhui chitin provided by Shouguang Marvell Marvell Biotechnology Biotechnology Limited. Shouguang Maiwei Biotechnology Limited (www.maiweishengwu.com) strong, credible, Shandong Weifang biological fertilizer industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Marvell biotechnology and you work into the brilliant, for a better future!