Copper (Cu) - 7 PPM Back Catalog number: 50744 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3130.5-K-IO Pentanoic acid (Valeric), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 109-52-4 Price on request BENDOS Endosulfan II (b), 1.2mL x 100ug/mL, nonane Price on request 684535 Pyriprole, 100 µg/ml, Acetonitrile, 1ml Price on request