- A poisonous ingredient, HgS, having two types:
- Ebony mercuric sulfide, a black powder obtained from mercury salts or by the reaction of mercury with sulfur, made use of as a pigment.
- Red mercuric sulfide, a bright scarlet dust produced by warming mercury with sulfur, utilized as a pigment.
- The sulfide of mercury, HgS, that develops as the mineral cinnabar.
Synonym for "mercuric sulfide"
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