Petroleum Marker Standard Back Catalog number: 95589 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2867.12-50-IO 2,3',4,4',5-Pentachlorobiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 446254-80-4 Price on request 98554 Formaldehyde (0.5 ppm) Price on request 2585.30-10MG Dibenzo[a,c]pentacene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 216-08-0 Price on request