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Contact SupplierHigh quality copper oxide cas 1317-38-0 copper oxide is black to brown amorphous powder or crystalline particles (monoclinic crystals). relative density 6.315, melting point 1446 °c, melting point 11.80kj/mol, mohs hardness 34, dielectric constant 18.10, insoluble in water, soluble in acid, ammonia, ammonium chloride, dissolved in sodium hydroxide to produce blue color solution, which leads to hydrogen at high temperature or carbon monoxide can be reduced to metallic copper. mainly used for circuit board plating, ferrite magnetic materials and other electronic industries, glass, ceramic, enamel, paint industry, wins out, fungicides, solar heat absorber surface, reducing  tar, artificial rainfall materials. Item electroplating grade electronic grade industrial grade cuo %≥ 98.5 98 98 zn %≤ 0.02 --- --- fe %≤ 0.01 --- --- pb %≤ 0.006 0.01 --- cd %≤ ---- 0.0005 --- hg %≤ ---- 0.0002 --- cr vl %≤ ---- 0.0002 --- acid insoluble %≤ 0.01 0.2 0.2 cl- %≤ 0.01 0.2 0.2 1.