EPA Method 507 - Performance Check Solution Back Catalog number: 19137 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0311.17-200-IO Benz[a]acridine, 200µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 225-11-6 Price on request 0634.10-K-IO 2,6-Dimethyloctane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2051-30-1 Price on request 61221 Aroclor 1221 in Transformer Oil Price on request