... .Particle size:550-180 Micron 2.Degree of oxidation: 96.99% 3.Physical and chemical 1. HIGH QUANLITY AND BEST PRICE ! SGS ... .54PropertiesBlack or brownish black color powder, slight hygroscopicity, density 6.3-6.9g/cm3,melting point 1326,insoluble in water and ... may be extinguished by water.1.Electroplating grade CuO 97%min Zn 200ppm max Fe 100ppm max Pb 60ppm max Cl ...