Product name: Alginic acid, sodium salt

Alias: Alginic acid sodium salt; Sodium alginate; alginic acid sodium; Algin; Polymannuronic acid sodium salt; SODIUM ALIGINATE; sodium 3,4,5,6-tetrahydroxytetrahydro-2H-pyran-2-carboxylate (non-preferred name); sodium (2S,3S,4S,5S,6R)-3,4,5,6-tetrahydroxytetrahydro-2H-pyran-2-carboxylate (non-preferred name)

CAS Number: 9005-38-3

Molecular formula: C6H9O7Na

Molecular Weight: 216.1212

 

Physicochemical properties:

White or pale yellow powder. Slowly dissolves in water to form a viscous solution, insoluble in ethanol, chloroform, or ether. Odorless and tasteless. The pH of the 1% aqueous solution is 6-8. The viscosity is stable at pH 6-9 and decreases when heated above 80°C. The product is hygroscopic. It is a hydrophilic polymer with very strong hydration force.

 

Product uses:

Sodium alginate is a highly viscous polymer compound. It differs from starch, cellulose, etc., in that it has a carboxyl group, which is a peruronitic acid formed by the aldehyde group of β-D-mannuronic acid with a glycosidic bond. Its functional properties are as follows:

(1) It is highly hydrophilic, and can be dissolved in both cold and warm water to form a very viscous and uniform solution.

(2) The formed true solution has a softness that is difficult to obtain with other analogues