ASTM D-4815 Internal Standard Back Catalog number: 51072 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0651.20-K-IO Crocetane, 1000µg/ml in Isooctane, 1ml Price on request 0239.20-200-T Benzo[a]pyrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 50-32-8 Price on request 8713.12-100-IO 2,2',3,3',4',5,5',6-Octachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 52663-73-7 Price on request