occurs both in the free state and in the calcium salt in the larger brown algae. The sodium salt gives a very viscous soltion in water even at a concentration of only 2%, and is used in the dyeing, te, mannuroon- ja guluroonhappejääkidest koosnev polüsahhariid, lahustub kuumas vees, moodustab sooli ja estreid - alginaate. Algiinhapet sisaldavad pruunvetikate rakuseinad, teda saadakse vetikaid leelis