Sodium alginate is a kind of polysaccharide extracted from kelp-like Phaeophyceae; formed by α-L-Mannuronic acid (M section) and β-D-Guluronic acid (G section) connected through 1, 4-glucosidic bond. It’s shown white or light yellow powder, odorless and tasteless. .
Molecular formula: (C6H7O6Na)n
1)Thickening: Sodium alginate could be easily dissolved in water and form the solution with high viscosity. It is widely be used as a thickening agent in food ,daily chemical and other industries.
2)Gelling: when the sodium alginate meet with calcium ion exchange action takes place rapidly to form gel, and the gel is anti-reversibility. the high G alginate gel is crispness but much rigider, while the high M alginate gel has the opposite property, flexibler with the less rigidity. different strengths of gel made by different proportions. with different gel, alginate can be used for difference of imitated food, medical materials, face masks, water treatment agents, clingfilm etc.