EPA Method 507 Pesticide Standard Back Catalog number: 91974 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98430 EPA 8240B Calibration Standard Price on request 56229 Copper (Cu) Price on request 3814.20-200-IO 1,2'-Binaphthyl, 200µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4325-74-0 Price on request