Goma gelana

gellan gum is used as a gelling agent, thickener, and stabilizer in cosmetic preparations.
A high molecular weight polysaccharide gum produced by a pureculturefermentation of a carbohydrate with Pseudomonas elodea,and purified by recovery with isopropyl alcohol, dried, and milled.It is a heteropolysaccharide comprising a tetrasaccharide repeatingunit of one rhamnose, one glucuronic acid, and two glucose units.The glucuronic acid is neutralized to mixed potassium, sodium,calcium, and magnesium salts. It may contain acyl (glyceryl andacetyl) groups as the O-glycosidically linked ester. It occurs as anoff-white powder that is soluble in hot or cold deionized water.