Acrodisc® syringe filters GHP membrane, diam. 25 mm, pore size 0.45 μm; find -Z259845 MSDS, related peer-reviewed papers, technical documents, Acrodisc® Syringe Filters for Analytical Sample Preparation - Pall Pall's GHP (hydrophilic polypropylene) membrane is a universal solvent membrane to reduce confusion with filter selection.