DESCRIPTION

Propylene Glycol Alginate occurs as a white to yellow, fibrous or granular powder. It is the propylene glycol ester of alginic acid (See the monograph for Alginic Acid.). It varies in composition according to its degree of esterification and the percentages of free and neutralized carboxyl groups in the molecule. It dissolves in water, in solutions of dilute organic acids, and depending upon the degree of esterification, in hydroalcoholic mixtures containing up to 60% by weight of alcohol to form stable, viscous, colloidal solutions at pH 3.