Whatman® GD/X syringe filters cellulose acetate membrane, pore size 0.45 μm, diam. 25 mm, sterile, pk of 50 ea; Synonyms: Z286907,syringe filter,syringe filters,Whatman filter; find -WHA69012504 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich