Sodium alginate cas no. 9005-38-3 basic information

Alginate is a kind of natural polysaccharide. Its chemical composition is linear copolymer formed by 1,4 bonding of Lu-d-mannouronic acid (M) and A-L-gururonic acid (G). The content of G and M in alginate has obvious effect on the gel-forming property of fiber. Alginic acid exists naturally in the cytoplasm and plays a role in strengthening cell walls. Alginate combines with various cations in seawater to form various alginate salts. The extract obtained from seaweed is usually sodium alginate. Sodium alginate has the properties of thickening, suspending, emulsifying, stabilizing, forming gel, forming film and spinning fiber. It has a long and wide range of applications in food, papermaking and cosmetic industries, especially in recent years, it has been found to have important applications in the field of biomedical engineering.

Chemical property

Molecular formula :C14H22O13

Molecular weight :398.3167

Physicochemical property

Relative density :1.67g/cm3

preparation

Common brown algae such as kelp, sargassum, phylla and macroalgae are major sources of alginic acid. Alginic acid is produced by reaction of the extract from seaweed treated with sodium hydroxide with strong acids such as sulfuric acid. Azotobacter and Pseudomonas can also be used in the biosynthesis of alginate, which can produce micron - or nano-scale structures for use in biomedical engineering.

use

industry

Alginic acid can quickly absorb water, can be used in paper and textile industry as a dehydrating agent and sizing agent. Its main function is in the form of sodium alginate or potassium alginate in the food industry and the daily chemical industry is used as an emulsifier or thickening agent, ice cream, milkshake and other food and cosmetics common ingredients.

medicine

Alginate is commonly used as an excipient in the pharmaceutical industry: its viscosity makes it the binder for tablets; As it expands in contact with water, it is also used as a disintegrant to disperse tablets in the body; Or used as a dispersant to disperse the active ingredient into the liquid to become a suspension; Alginate is used as a drug sustained release agent. Dentistry uses it instead of plaster and rubber to make dental molds. Alginate itself can be used as an absorber to treat heavy metal poisoning.