... °C, boiling point 1800 °C, it dissolves in hydrochloric aid, ammonium chloride and ammonia water, it ... turned into coper oxide in wet weather, and it is very steady and poison in dry weather.Usage: ... It’s used as antipollution paint in the bottom of ... it can be also used as germicide, colorant in ceramics and enamel, coloring kinds of nantokites, analytical ...