Merck, 68059-1G, FITC-CM-Dextran

FITC-CM-Dextran, also known as Fluorescein isothiocyanate–Carboxymethyl–Dextran, is an anionic fluorescent probe. The carboxyl group provides the negative charge, which improves the overall permeability of the molecule. It is supplied as a yellow powder that is freely soluble in water and electrolyte solutions. FITC-CM-Dextran is insoluble in most organic samples such as ethanol, methanol, acetone, and chloroform. FITC-CM-Dextran is manufactured by reacting selected dextran fractions with an activated carboxymethyl derivative in alkali, whereby O-carboxymethyl groups are introduced along the dextran chain.