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Sodium alginate

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Other names

  • Algin
  • Alginate sodium salt
  • Alginic acid monosodium salt
  • Alginic acid
  • Sodium salt
  • Alginic sodium
  • Polymannuronic acid sodium salt
  • Sodium alginate

Product description

Sodium Alginate is the sodium salt form of alginic acid and gum mainly extracted from the cell walls of brown algae, with chelating activity.

Alginate is a natural polysaccharide at levels of 30 to 60% in certain species of brown algae (on a dry weight basis). Alginate is considered to have dietary fiber properties. Alginic acid accumulates in brown seaweeds and forms a structural component of the cell walls. This accumulation of alginate also gives flexibility to seaweed and allows the seaweed to withstand tidal forces. Alginic acid was first isolated and named by a Scottish scientist, Dr. E.C.C. Stanford, in1883. Since then, alginic acid and its derivatives have been utilized as a hydrocolloid in a variety of applications such as food additives, pharmaceuticals, cosmetics and textile printing.

Functional uses: Stabilizer, thickener, gelling agent, emulsifier.

  • stabilizer: Sodium Alginate can avoid of ice crystal and make the product tasty. It also applies to the mixed drinks, such as ice lolly, iced fruit juice and iced milk, etc. Sodium Alginate can keep the product fine and avoid of spliting open if it is used as a cover of mild food.
  • Thickener and emulsion: Sodium Alginate can raise the product’s stabilization and decrease the liquid out when it is used in sala flavoring, pudding jam, tomato ketchup and the canned products.
  • Conservation Sodium Alginate suits to make kinds of gel product, which can be kept the fine state, conleakge and contraction.
  • Pharmaceutical (Alginic acid is used in several pharmaceutical applications. Alginic acid is compounded into tablets to accelerate tablet disintegration for a faster release of the medicinal component. Alginate forms a gel in the highly-acidic stomach and protects the stomach mucosa)
  • In adhesive paste
  • In textile industry (Alginate is used in the color paste substrate when applying patterns to print fabrics, scarves, towels, etc. The use of alginate in the printing of cotton, jute and rayon is a necessity. Alginate is safer and easier to decompose compared with other substrates in textile printing and gives easier waste water disposal)
  • In food industry (Alginate has an excellent functionality as a thickening agent, gelling agent, emulsifier, stabilizer, texture-improver (for noodles), by improving the quality of food. Nowadays, based on its unique properties, alginate is added to numerous kinds of food, such as ice cream, jelly, acid milk drinks, dressings, instant noodles, beer, etc. FAO/WHO certifies alginate in food applications as one of the safest food additives.)
  • In cosmetics (Alginate is used in several cosmetics due to its functionality as a thickener and moisture retainer. Alginate helps retain the color of lipstick on the lip surface by forming a gel-network)
  • Animal Feed (Alginate is used as a binder and thickening agent for pet-food, fish food, etc)
  • Welding Rods (Alginate is used as a flux binder in the production of welding rods)
Appearance White to yellowish brown filamentous, grainy, granular or powdered forms
Chemical formula (C6H7NaO6)n or C6H9NaO7
Loss on drying Not more than 15 % (105 °C, 4 hours)
Formaldehyde Not more than 50 mg/kg
Arsenic Not more than 3 mg/kg
Lead Not more than 5 mg/kg
Mercury Not more than 1 mg/kg
Cadmium Not more than 1 mg/kg
PH 6.5-7.5
Assay (on dry basis) ≥ 98%