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Cupric sulfate in porcelain bowl over white. bright blue copper sulfate cuso4, also blue vitriol or bluestone. salt, used as algicide in swimming pools, for fireworks and in schools to grow crystals. - 62388494

Cupric sulfate in porcelain bowl over white. bright blue copper sulfate cuso4, also blue vitriol or bluestone. salt, used as algicide in swimming pools, for fireworks and in schools to grow crystals.

 62388494

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