Mercuric-sulfide meaning

A poisonous compound, HgS, having two forms:
  • Black mercuric sulfide, a black powder obtained from mercury salts or by the reaction of mercury with sulfur, used as a pigment.
  • Red mercuric sulfide, a bright scarlet powder occurring naturally or prepared by heating mercury with sulfur, that is sensitive to heat and light and is used as a pigment.
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(inorganic chemistry) The sulfide of mercury, HgS, that occurs as the mineral cinnabar.
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