Algin
Title: Algin
CAS Registry Number: 9005-38-3
CAS Name: Alginic acid sodium salt
Additional Names: sodium alginate; sodium polymannuronate
Trademarks: Alto (Kyosei); Alman (Kyosei); Alloid (Kyosei); Allose (Kyosei)
Literature References: A gelling polysaccharide extracted from giant brown seaweed (giant kelp, Macrocystis pyrifera (L.) Ag., Lessoniaceae) or from horsetail kelp (Laminaria digitata (L.) Lamour, Laminariaceae) or from sugar kelp (Laminaria saccharina (L.) Lamour). Process of manuf: Tseng, Chem. Metall. Eng. 52, 97 (1945); Mantell, The Water-Soluble Gums (New York, 1947); Green, US 2036934 (1936 to Kelco); Gloahec, Herter, US 2128551 (1938 to Algin Corp. of America). Wound healing properties and use in hemostatic dressings: J. H. M. Miller, GB 1328088 (1973 to Wallace, Cameron & Co.), C.A. 80, 6974u (1974). Series of articles on hemostatic effects: Yakugaku Zasshi 101, 452-469 (1981), C.A. 95, 35654e, 35655f, 35405z (1981). Immunoadjuvant effect: G. H. Scherr, A. S. Markowitz, US 3075883 (1963 to Consolidated Labs.). Clinical comparison with alum immunoadjuvant: G. Bruno et al., Ann. Allergy 56, 384 (1986). Review of structural studies: D. A. Rees, E. J. Welsh, Angew. Chem. Int. Ed. 16, 214 (1977). Review of production, properties and use in the food industry: A. Askar, Alimenta 21, 165-169 (1982). Reviews: McNeely, Pettitt, in Industrial Gums, R. L. Whistler, Ed. (Academic Press, New York, 2nd ed., 1973) pp 49-81; I. W. Cottrell, J. K. Baird, "Gums" in Kirk-Othmer Encyclopedia of Chemical Technology vol. 12 (Wiley-Interscience, New York, 3rd ed., 1980) pp 48-51.
Properties: Cream-colored powder. Sol in water, forming a viscous, colloidal soln. Insol in alcohol and in hydro-alcoholic solns in which the alcohol content is >30% w/w. Insol in chloroform, ether, in aq acid solns when the pH is below 3.
Use: In the manufacture of ice cream where it serves as a stabilizing colloid, insuring creamy texture and preventing the growth of ice crystals. In drilling muds; in coatings; in the flocculation of solids in water treatment; as sizing agent; thickener; emulsion stabilizer; suspending agent in soft drinks; in dental impression preparations. Pharmaceutic aid (suspending agent).
Therap-Cat: Hemostatic.
Keywords: Hemostatic.

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