noun[mass noun] archaic
Crystalline zinc sulphate.
- A viscous residue in the bottom of each and a foul smell that denoted combinations of alum with white vitriol, sulphate of iron, and of acetate of lead with opium and ipecac.
- Formerly it was ground finely in oil, either pure or with a mixture of white vitriol and added to the dark oil paints.
- Some sulfates were formerly known as vitriols; blue vitriol is cupric sulfate, green vitriol is ferrous sulfate, and white vitriol is zinc sulfate.
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