EPA Method 500 Series Internal Std #4 Back Catalog number: 30003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 15900-1000-10AN10 Coumaphos, 10µg/ml in Acetonitrile, 10ml Price on request 674603 Triclosan-methyl, 10.0 µg/ml, Cyclohexane, 10ml Price on request 2234.17-050-5AN Aflatoxin B2, 0.5 µg/ml, Solvent-acetonitrile, Unit 5mL, # of units-1, Cas.no. 7220-81-7 Price on request