EPA Method 502.2/624Mix Back Catalog number: 93600 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C20600000 Benzo[b]naphtho[2,1-d]thiophene, 10mg Price on request 679556 D5-Nalidixic acid, 10mg Price on request 677651 Demeton-O, 25mg Price on request