Caffeine, 100µg/ml in MeOH, 1ml Back Catalog number: 97536 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 1581.2-250MG Dicyanodiamide (Cyanoguanidine), neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 461-58-5 Price on request 673368 Isofenphos-oxon, 10 µg/ml, Acetonitrile, 10ml Price on request 91131 Complete Set of Aroclor Mixes Price on request