Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70405 1,1,1-Trichloroacetone Price on request 8227.13-100 Pirimiphos-ethyl, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 23505-41-1 Price on request 3913.28-100-HX Campesterol, 100µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 474-62-4 Price on request