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(Elements & Compounds) a copper salt found naturally as chalcanthite and made by the action of sulphuric acid on copper oxide. It usually exists as blue crystals of the pentahydrate that form a white anhydrous powder when heated: used as a mordant, in electroplating, and in plant sprays. Formula: CuSO4
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|Noun||1.||copper sulphate - a copper salt made by the action of sulfuric acid on copper oxide|
blue copperas, blue stone, blue vitriol, chalcanthite - hydrated blue crystalline form of copper sulfate