Casein

35.01 - Casein, caseinates and other casein derivatives; casein glues. - Casein 3501.90 - Other 3501.10 (A) Casein and casein derivatives. (1) Casein is the main protein constituent of milk. It is obtained from skimmed milk by precipitation (curdlin ), generally with acids or rennet. The heading covers various types of casein whici? differ according to the method of curdhng, e.g., acld casein, caseinogen and rennet casein (paracasein). Casein is of papers, and fibres, dietary or pharmaceutical products. powder, soluble in alkalis but not in paints or distempers, for the coating (hardened casein), man-made (2) Caseinates (salts of casein) include the sodium and ammonium salts known as "soluble caseins"; these salts are normally used to prepare concentrated foods and pharmaceutical roducts. Calcium caseinate is used in the preparation of foodstuffs or as a glue, accor ng to its character. ti (3) Other casein derivatives include, in particular, chlorinated casein, brominated casein, iodised casein and casein tannate. They are used in pharmacy. (B) Casein glues. These consist of calcium caseinate (see Note on caseinates above), or of mixtures of casein and chalk wlth the addition of, for example, small quantities of borax or ammonium chloride. They are usually in the form of powders. The heading does not include : (a) Precious metal caseinates (heading 28.43) or caseinates of headings 28.44 to 28.46 and 28.52. (b) Products incorrectly described as "vegetable casein" (beading 35.04). (c) Casein glues put up for retail sale, not exceeding a net weight of 1 kg (heading 35.06). (d) Hardened casein (heading 39.13). -