EPA Method 508 Standard Back Catalog number: 92358 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3449.8-100-AN Methyl parathion, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 298-00-0 Price on request 9437.7-100-CY 3,5-Dichlorobenzoic acid Price on request 79300 Heptachlor Price on request