EPA Method 526 Standard Back Catalog number: 93199 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57019 Potassium (K), 1000µg/ml in 2%-HNO3/Water, 100ml Price on request 1088.20-100-TX10 Benzo[a]pyrene-d12, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-10, Cas.no. 63466-71-7 Price on request 682642 Diphenylacetic acid, 1000mg Price on request