Carrageenan is obtained by aqueous extraction of natural strains of seaweeds of Gigartinaceae, Solieriaceae, Hypneaceae and Furcellar iaceae, families of the class Rhodophyceae (red seaweeds). No organic precipitant shall be used other than methanol, ethanol and propane-2-ol. Carrageenan consists chiefly of potassium, sodium, magnesium and calcium salts of polysaccharide sulphate esters which, on hydrolysis, yield galactose and 3, 6-anhydrogalactose. Carrageenan shall not be hydrolysed otherwise chemically degraded.

Storage:
It must be sealed and stored in the place of ventilation, dry and shady and cool, and cannot be mixed with poisonous. The temperature must be not higher than 20° C. Shelf life of the product is 24 months from date of production.