Petroleum Marker Standard Back Catalog number: 95589 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C-157N 2,3,3',4,4',5'-Hexachlorobiphenyl, 5mg Price on request 1686.10-K-IO 2-n-Butyl-5-ethylthiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 54411-06-2 Price on request 675022 Fenson, 10 µg/ml, Cyclohexane, 10ml Price on request