Carbon Dioxide, USP, Medical Gas, packaged in a) size EA aluminum, CGA940 (CDUSPEA), b) size E CGA 940 (CDUSPE), c) 50 lb CGA320 (CDUSP50, CD USP50S), d) size 160 liter (CD USP160LT350) cylinders, Rx only, Airgas, Puritan Medical, Distributed By: Airgas USA, LLC, Radnor, PA. Class I - Dangerous Impurities/Degradation Products: Out Of Specification levels of nitrogen dioxide. Apr 10, 2012 Prescription Drugs View Details →