EPA Method 551.1 Performance Check Sol’n Back Catalog number: 30115 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79278 gamma-BHC Price on request 70911 1,2-Dinitrobenzene, 1000µg/ml in MeOH, 1ml Price on request 3492.10-100-CY Propetamphos Price on request