Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended NK-ST-A4 Native PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 9659.8-10MG Indole, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 120-72-9 Price on request 79028 Benzo(b)fluoranthene, 1000µg/ml in Acetonitrile, 1ml Price on request