Petroleum Marker Standard Conc Back Catalog number: 95590 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2714.15-100-IO 2,4-Dimethylbenzo[h]quinoline, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 605-67-4 Price on request 55309 Total DMRQA (Kit) Price on request 1739.12-K-T 3,3'-Dinitrobenzidine, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 6271-79-0 Price on request