Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59221 Total Organic Carbon (C) Price on request 682468 2,6-Diaminotoluene, 1000mg Price on request 2006.12-25MG 3,3',4,4'-Tetrachlorobiphenyl, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 32598-13-3 Price on request