Chlorpyrifos Back Catalog number: 79508 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 74301 4-Methyl-1H-benzotriazole, 1000µg/ml in MeOH, 1ml Price on request 30016 4-Nitrophenol Price on request 9878.17-50-IO 1,2,5-Trimethylphenanthrene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 146448-87-5 Price on request