COPPER (METAL) POWDER LR ELECTROLYTIC - 25gm, (Cu) CAS No. 7440-50-8, M.W. 63.55, Assay : 99.5%, Substances insoluble in HNO3 : 0.05%, Antimony : 0.005%, Arsenic : 0.0002%, Lead : 0.05%, Iron : 0.005%, Manganese : 0.005%, Silver : 0.005%, Tin : 0.005%,
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