EPA Method 8141A/1657 - Analytes Back Catalog number: 92800 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680123 Nicotinic acid, 250mg Price on request 678188 Carbophenothion-methyl, 10mg Price on request 3633.15-50-AN T-2 Tetraol, 50µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 34114-99-3 Price on request