Whatman™ EXPRESS-ION™ D is a weak anion exchange cellulose substituted with diethylaminoethyl (DEAE) groups and recommended for separations between pH 2 and pH 9. This ion exchange medium’s charge is highly dependent on pH conditions. EXPRESS-ION™ media are matrices whose flow characteristics have been greatly improved. The manufacturing process has been optimized so that the matrix allows faster flow while retaining its inherently fast kinetics of adsorption and desorption. EXPRESS-ION™ D ion exchange cellulose is supplied as a moist powder. Pre-cycling and fines removal are not required prior to use. 250g.