Crotonaldehyde-DNPH Back Catalog number: 83544 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 56034 Selenium (Se) Price on request 0017.18-100-T 6-Nitrochrysene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 7496-02-8 Price on request DF-SS-A Mass-Labelled PCDD Sampling Spike Solution, 1.2ml x 1000ng/ml, nonane Price on request