Sodium alginate ke sehlahisoa sa ho nt?a iodine le mannitol ho tsoa ho algae e sootho e kang kelp kapa leoatleng. Molek'hule ea eona e entsoe ka β - D-mannuronic acid (M) le α - L-guluronic acid (G) e kopantsoeng ke li-bond (1 → 4). Sodium alginate aqueous solution e na le viscosity e phahameng 'me e' nile ea sebelisoa e le motenya, stabilizer, emulsifier, joalo-joalo lijong. Sodium alginate ke lijo tse se nang chefo tse neng li kenyelelitsoe United States Pharmacopeia mathoasong a 1938. Sodium alginate e na le palo e kholo ea - COO -, e ka bont?ang boit?oaro ba polyanionic ka tharollo ea metsi 'me e na le tekanyo e itseng ea ho khomarela. E ka sebelisoa e le sejalo sa lithethefatsi bakeng sa ho phekola lisele tsa mucosal. Tlas'a maemo a acidic, - Ha COO - e fetoloa COOH, tekanyo ea ionization e fokotseha, hydrophilicity ea sodium alginate e fokotseha, ketane ea molek'hule ea fokotseha, 'me boleng ba pH bo eketseha Sehlopha sa COOH se tsoela pele ho ikarola, ho eketsa hydrophilicity ea sodium alginate le ho otlolla ketane ea molek'hule. Ka hona, alginate ea sodium e na le kutloisiso e kholo ea pH. Sodium alginate e ka etsa gel kapele tlas'a maemo a bobebe haholo. Ha li-cation tse kang Ca2 + le Sr2 + li le teng, Na + ho G unit e tla fapanyetsana le divalent cations, 'me G unit e tla stack ho etsa sebopeho sa marang-rang se amanang le sefapano, kahoo se etsa hydrogel. Maemo ao ho ona alginate ea sodium e etsang li-gel e bonolo, e ka qobang ho se sebetse ha lithethefatsi tse bobebe, liprotheine, lisele, li-enzyme le lintho tse ling tse sebetsang. Ka lebaka la thepa ena e ntle haholo, sodium alginate e sebelisitsoe haholo indastering ea lijo le masimong a meriana.