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| realgar | |||
| red arsenic sulfide (As4S4); red orpiment (As4S4); arsenic ruby (As4S4); realgar (As4S4); arsenic tetrasulfide (red); arsenic bisulphide; red arsenic sulphide | |||
| arsenic disulfide | |||
| red arsenic; red orpiment; roseaker; ruby arsenic; ruby of arsenic (sulphur); ruby sulphur | |||
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| arsenic tetrasulfide (red) | |||
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Realgar : 6 phrases in 1 subject |
| Chemistry | 6 |