Copper (Cu) - 2 PPM Back Catalog number: 50591 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 685300 Clethodim-sulfoxide, 100 µg/ml, Acetonitrile, 1m Price on request X9141 2-Nitroaniline Price on request 71889 Geosmin Price on request