Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72729 4-Isobutylbenzoic acid Price on request 59504 ICP-MS Standard Price on request 9515.12-100-IO 3-Fluoro-2,3',4',5-tetrachlorobiphenyl, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request