Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681926 Telodrin, 100 µg/ml, Ethyl acetate, 5ml Price on request 3036.8-100-ME 2,4,4-Trimethyl-2-pentene, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 107-40-4 Price on request 79010 Ethylenediamine, 1000µg/ml in MeOH, 1ml Price on request