1.1 ,This specification covers polysulfone resin (poly(oxy-1,4-phenylenesulfonyl-1,4–,phenylene (dimethylmethylene)-1,4–,phenylene)) as defined in ISO 25137–,1, supplied by a vendor in virgin form (pellets, powder, fabricated forms and so forth) for medical applications. This specification provides requirements and associated test methods for this thermoplastic when it is intended for use in manufacturing medical devices or components of medical devices.