Sodium alginate is extracted from kelp of brown algae or sargasso by-products after iodine, mannitol, its molecules by beta – D – mannose hyaluronic acid (beta – D – mannuronic, M) and alpha – L – gulonic hyaluronic acid (alpha – L – guluronic, G) can be connected with the press (1-4), is a kind of natural polysaccharide, with pharmaceutical preparations auxiliary materials required for stability, solubility, viscosity, and security. Sodium alginate has been widely in the food industry and medical field application