According to the information, it is chitosan (CAS No. 9012-76-4) for technical use, which is obtained from the shells of crabs and crabs that come from food processing companies. The shells are dried and treated with hydrochloric acid and sodium hydroxide solution to remove the protein and calcium carbonate. What remains is chitin, which is boiled with 50% sodium hydroxide solution at temperatures above 100 ° C for several hours in order to obtain chitosan through deacetylation. No sample was submitted. The safety data sheet submitted shows that it is chitosan in powder or flake form. The goods are to be classified as other modified, natural polymers in primary form under subheading (CN) 3913 9000 of the customs tariff.
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[1][1]. DEBTI24178/21-1#749773