Minisart® RC25 Syringe Filter 17765----------K, 0.45 µm Regenerated Cellulose. Minisart ® RC with hydrophilic regenerated cellulose (RC) is optimized for aqueous liquids and solvents with a pH of 3 - 14 and is stable against DMSO. Type 17765 with a pore size of 0.45 µm can be used for sample preparation and has a male luer slip outlet.