copper sulphate

noun

1. 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: CuSO 4

Example Sentences

But there are still concerns that a toxic chemical, such as copper sulphate, might have caused the colour change.

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Today when industrial-scale food adulteration occurs, such as the 85,000 tonnes of olives treated with copper sulphate that Italian police seized in February, we expect a systemic response.

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Italian officers found 85 tonnes of olives painted with copper sulphate to enhance their green colour.

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In Mexico in 2014, 40m litres of copper sulphate from a mine owned by Southern’s parent company leaked into a river.

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Guardian critic Jonathan Jones described the copper sulphate chamber as 'one of the truly worthwhile and significant moments of modern British art'.

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