EPA Method 549.1 Analytes Back Catalog number: 32079 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2527.11-100-ME 4-Isobutylbenzoic acid, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 38861-88-0 Price on request 91474 EPA 601 - 624Mix Price on request 11290.18-100-AN Triphenyl-d15-tin hydroxide,100 µg/mL,acetonitrile,1mL, Price on request