Copper (Cu) - 1 PPM Back Catalog number: 50590 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680914 Bensulfuron-methyl, 10.0 µg/ml, Acetonitrile, 10 Price on request 54113 Ammonia as N Price on request 673507 Chlorothalonil, 10.0 µg/ml, Ethyl acetate, 10ml Price on request