Sodium alginate

CAS NO.：9005-38-3

Appearance:Milky white to pale yellow powder

Viscosity(mPa.s):300-700 or according to your requirement.

Product name：	Sodium alginate
Synonym:	6-[(2-carboxy-4,5-dihydroxy-6-methoxy-3-oxanyl)oxy]-4,5-dihydroxy-3-methoxy-2-oxanecarboxylic acid;Alginic Acid Sodium Salt;Alginate Sodium
CAS:	9005-38-3
Appearance:	Milky white to pale yellow powder
Viscosity(mPa.s):	300-700
MF：	C5H7O4COONa
MW：	0
Transport Information:	Non-dangerous goods
HS Code:	3913100000
Product manager	Eva Zhao Email: eva@coreychem.com

I.Key Properties

Gelling Property: This is its most important characteristic. When a sodium alginate solution comes into contact with divalent cations (especially calcium ions, except magnesium), it instantly forms a heat-stable, non-reversible gel. This gentle process, which doesn’t require heating, is known as “ionotropic gelation.”
Thickening and Stabilizing: It dissolves in water to form a viscous colloid, providing excellent thickening, suspending, and emulsifying stability.
Film-Forming Ability: It can form tough and transparent films.
Biocompatibility and Biodegradability: It is non-toxic, harmless, biodegradable by the body, and exhibits good biocompatibility.
pH Sensitivity: Under acidic conditions (pH < pKa), sodium alginate converts to water-insoluble alginic acid and precipitates.

II. Primary Uses

1. Food Industry (as Food Additive)

Thickener and Stabilizer: Used in ice cream, yogurt, and salad dressings to prevent ice crystal formation, improve texture, and maintain stability.
Gelling Agent: Used to make artificial fruit bits, jellies, and gummy candies.
Film Former: Used as a coating on fruits and meats for preservation and anti-microbial purposes.

2. Pharmaceutical Industry

Pharmaceutical Excipient:
- Binder and Disintegrant: Used in tablet manufacturing for binding powders and controlling the disintegration rate of tablets in the body.
- Film-Forming Material: Used to prepare microcapsules and drug coatings for controlled or targeted drug release.
Wound Dressings: Alginate dressings (e.g., alginate fiber ropes) are highly absorbent. They react with wound exudate to form a soft gel, providing a moist healing environment that promotes granulation tissue formation. They can be removed without damaging new tissue and are ideal for heavily exuding wounds.
Gastroesophageal Reflux Inhibitor: Formulated with sodium bicarbonate . Upon reacting with stomach acid, it forms a low-density, gel-like “raft” that floats on top of the stomach contents, physically blocking reflux into the esophagus and relieving heartburn.

3. Other Industries

Textile Printing: Used as a thickener in printing pastes to ensure sharp patterns.
Cosmetics and Personal Care: Used as a binder in toothpaste and a film-forming agent in face masks.

Packaging: 25kg/drum

Storage: store in cool, dry place, tightly sealed.

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