Freon Standard Back Catalog number: 96694 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50013 Multi-Element Calibration Standard-4 Price on request 35021 EPA Method 502/524 Volatile Standard Price on request 1000.5-1ML Ethyl-n-propylsulfide, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 4110-50-3 Price on request