Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676985 Valproic acid, 100mg Price on request 2326.12-10-IO Arochlor 5460 , 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 11126-42-4 Price on request A578490 Amikacin, 500mg Price on request