Cupric Oxide, Powdered, Reagent A.C.S.

Assay:≥99.0%
CuO
MAXIMUM ALLOWABLE 
Insoluble in dilute hydrochloric acid: 0.02%
Carbon compounds (as C): 0.01%
Chloride (Cl): 0.005%
Nitrogen compounds (as N): 0.002%
Sulfate (SO4): 0.02%
Free alkali: Passes test
Calcium (Ca): 0.01%
Iron (Fe): 0.05%
Potassium (K): 0.02%
Sodium (Na): 0.05%
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