Alginates are hydrocolloids, water soluble biopolymers extracted from brown seaweed. Alginates occurs naturally in seaweed mainly in the form of calcium, magnesium and sodium salts.The chemical composition of alginate varies according to seaweed species and structure. Many countries supply seaweed as a raw material to the alginate industry. These include USA, Mexico, Chile, Scotland, Ireland, France, Norway, Iceland, Canada, China, Japan, Korea, Australia and South Africa.
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