Antimony pentasulfide
| Antimony pentasulfide | |
|---|---|
| Identifiers | |
| CAS number | 1315-04-4  |
| PubChem | 11338637 |
| ChemSpider | 17615643 |
| ATC code | R05 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | S5Sb2 |
| Molar mass | 403.85 g mol−1 |
| Appearance | yellow to orange powder |
| Solubility in water | insoluble |
| Solubility | soluble in HCl soluble in alkalis |
| Hazards | |
| EU classification |  F |
| R-phrases | R11 |
| Related compounds | |
| Related compounds | Antimony(III) sulfide |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Antimony pentasulfide is an inorganic compound of antimony and sulfur, also known as antimony red. It is a nonstoichiometric compound with a variable composition. Commercial samples are usually are contaminated with sulfur, which may be removed by washing with carbon disulfide in a Soxhlet extractor. It may be used as a red pigment and is one possible precursor to Schlippe's Salt, Na3SbS4, which can be prepared according to the equation:
- 3 Na2S + Sb2S5 + 9 H2O → 2 Na3SbS4·9H2O
Like many sulfides, this compound liberates hydrogen sulfide upon treatment with strong acids like hydrochloric acid.[1]
- 6 HCl + Sb2S5 → 2 SbCl3 + 3 H2S + 2 S
Analysis by Mössbauer spectroscopy indicates that this compound is a derivative antimony(III),[2] explaining the production of antimony(III) chloride, rather than antimony(V) chloride, upon acidification. It is therefore not analogous to the phosphorus(V) compound phosphorus pentasulfide.
References [edit]
- ^ Strem MSDS
- ^ G. G. Long, J. G. Stevens, L. H. Bowen, S. L. Ruby (1969). "The oxidation number of antimony in antimony pentasulfide". Inorganic and Nuclear Chemistry Letters 5 (1): 21–25. doi:10.1016/0020-1650(69)80231-X.
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