Sodium Alginate

Characteristic

Sodium Alginate

Sodium alginate is a natural hydrophilic polysaccharide isolated from marine brown algae. It consists mainly of the sodium salt of alginate, a copolymer of β-D-mannuronic acid (M-unit) and α-L-gulonuronic acid (G-unit) linked by β-1,4-glycosidic bonds and composed of different proportions of GM, MM and GG fragments. It has the characteristics of thickening, suspending, emulsifying, stabilizing, forming a gel, forming a film and spinning fibers, and has a long and extensive use in the food, textile and printing industries.

Specification

Item	Food Grade Sodium Alginate	Industrial Grade Sodium Alginate
CAS Number	9005-38-3	9005-38-3
Catalog Number	MC9005383	MC9005383
Molecular Formula	(C₆H₇O₆Na)_n	(C₆H₇O₆Na)_n
Production Process	Extracted from marine brown algae	Extracted from marine brown algae
Appearance	White to yellowish fibrous or granular powder	White to yellowish fibrous or granular powder
Grain Size	Conformity with requirements (30/60/80/100/120/170/200 mesh)	Conformity with requirements (30/40/60 mesh)
Viscosity (20°C), mpa.s	Conformity with requirements (Low: 20-100, 100-200; Medium: 200-600, 600-800; High: 800-1000, ≥1000)	Conformity with requirements (Low: 20-100; Medium: 100-800; High: 800-1000, ≥1000)
pH	6.0-8.5	6.0-7.5
Ash (dry basis)	18-27%	≤25%
Water Content	≤15%	≤15%
Water Insoluble (dry basis)	≤3%	≤0.6%
Lead (Pb)	≤5 ppm	-
Arsenic (As)	≤3 ppm	-
Heavy Metal	≤4 ppm	-

Note: The parameters of the product can be adjusted according to your requirements.

Applications

Food industry

Food grade sodium alginate is widely used in the food industry for its thickening, gelling and stabilizing properties. Typical applications are described below.

a. Agricultural industry

In the production of rice and noodles, breakage and crisp rate are important indicators. As a natural high molecular polysaccharide, sodium alginate helps to increase the gluten rate of wheat, improve the stickiness of rice and noodles, and reduce the breakage and recovery rate of wet rice and noodles.

Agricultural industry

b. Jelly and pudding

Jelly and pudding

When calcium salts come into contact with sodium alginate solution, it forms a gel. Using this property, clear and soft jellies and puddings can be prepared.

c. Ice cream

By combining thickening and gelling functions, sodium alginate is used as a stabilizer to maintain the physical properties of the ice cream. Ice cream with the addition of sodium alginate is not only smooth and delicate, but also less likely to form ice crystals during storage.

Ice cream

Textile and printing industry

Textile and printing industry

The main application of industrial grade sodium alginate is textile and printing. In the textile printing industry, sodium alginate is used in color pastes for reactive dyes and as a thickening agent for reactive dyes in textile screen printing.

Others

Sodium alginate is an essential dietary fiber that binds organic substances and lowers serum cholesterol and blood sugar, thus preventing modern diseases such as hypertension, diabetes and obesity. Sodium alginate can also be used as an active ingredient in medicines. For example, as a tablet binder for penicillin and sulfa drugs. In addition, in the field of cosmetics, sodium alginate has the effect of retaining moisture in cosmetics.

Choose Alfa Chemistry

As a first-class supplier of marine biomaterials, we have experienced experts and professional R & D laboratories. We can provide our customers with sodium alginate for different application scenarios. Depending on your requirements, we customize our products for you with different grain sizes and viscosities. If you would like more information, please feel free to contact us.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.