Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677579 L-Isoleucine, 250mg Price on request 675456 Fenamiphos-sulfoxide, 10 µg/ml, tert-Butyl methyl Price on request PN-68S 1,2,3,5,6,8-Hexachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request