1,3-Butadiene Back Catalog number: 33004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9928.16-50UG 6:2 Di-PAPS-d4, neat, Solvent-neat, Unit ca. 50 µg, # of units-1, Cas.no. Price on request 683731 beta-Cypermethrin, 10.0 µg/ml, Ethyl acetate, 10 Price on request 97129 Aldehyde/Ketone - DNPH Standard Price on request