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Sodium Alginate

Introduction: Sodium alginate, a natural polysaccharide, has the stability, solubility, viscosity and safety required for pharmaceutical excipients. In 1881, British chemist E.C. Stanford first conducted scientific research on alginate extracts from brown seaweed. He found that the alginic acid extract has several very interesting properties. It has the ability to concentrate solutions, form gels and form films. Based on this, he submitted several applications for industrial production. However, alginate did not undergo large-scale industrial production until 50 years later. Commercial production began in 1927, and now the world produces about 30,000 tons per year, of which 30% is used in the food industry, and the rest is used in other industries, pharmaceuticals and dentistry.

【Basic information】

Chinese name

Sodium Alginate

Molecular weight

216.12303 (sugar unit)

Foreign name

Sodium alginate(Commonly used abbreviation SA or NaAlg)

CAS number



Algin; Sodium Alginate etc.

Boiling point

495.2°C at 760 mmHg

Chemical formula


Use 1: Used as a sizing agent and printing paste for textiles, and also used as a thickener, stabilizer, and emulsifier in the food industry

Use 2: As an emulsion stabilizer and thickener, it can be used in various foods according to my country's regulations, and should be used in appropriate amounts according to production needs.

Use three: stabilizer; thickener; emulsifier; dispersant; gelling agent; coating agent; suspending agent.

It is used in ice cream and cold spots in Japan to improve the shape retention and make the tissue fine. The dosage is 0.1%~0.4%. When making fillings, it gives cohesiveness, and its dosage is 0.1%~0.7%. Because it is a hydrophilic polymer, it has strong hydration properties, making it difficult to form ice crystals from the water absorbed by the stabilizer.

Used in the United States for pie fillings, meat sauces, gravies, frozen foods, chocolate, butter-flavored hard candies, cold spot gels, jelly gums, syrups, emulsions, etc. The dosage is 0.1%~ 0.5%.

In beer production, it is used as a solidification remover of copper, and at the same time it is removed together with protein and tannins.

It can be made into film and used for candy anti-stick packaging.

Purpose 4: Used to increase blood volume and maintain blood pressure, eliminate histamine toxins and traumatic blood loss caused by burns, stabilize the circulatory system before and after surgery, massive hemorrhagic shock, burn shock, high fever and acute dysentery and other systemic dehydration, treatment The effect is good. It also has the effects of excreting cholesterol from the body, inhibiting the absorption of Pb, Cd, and Sr by the human body, protecting the gastrointestinal tract, regulating intestines, losing weight, and lowering blood sugar. It is mainly used as a suspending agent, emulsifier, viscosifier, and capsule material for microcapsules.

Use 5: Sodium alginate is a high-viscosity polymer compound. The difference between it and starch, cellulose, etc. is that it has a carboxyl group, which is a glycouronic acid formed by the aldehyde group of β-D-mannuronic acid with glycoside bonds.

Use six: stabilizer, thickener, as artificial semipermeable membrane, mordant. Biochemical grade is used to immobilize cells and enzymes; for example, the sodium alginate method to immobilize glutamate decarboxylase.

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