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Antimony pentasulfide

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Antimony pentasulfide
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ATC code R05CA07
1315-04-4 7pxY
ChemSpider 17615643 7pxY
EC number 215-255-5
Jmol-3D images Image
PubChem Template:Chembox PubChem/format
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This page is a soft redirect. Properties

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S5Sb2
Molar mass Lua error in Module:Math at line 495: attempt to index field 'ParserFunctions' (a nil value). g·mol−1
Appearance yellow to orange powder
Density 4.12 g/cm 3
Melting point Script error: No such module "convert". (decomposes)
insoluble
Solubility soluble in HCl
soluble in alkalis
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EU classification Highly Flammable F
R-phrases R11
Flash point flammable
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This page is a soft redirect. Related compounds

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Related compounds
Antimony(III) sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 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. Its exact structure is unknown.[1] Commercial samples are usually are contaminated with sulfur, which may be removed by washing with carbon disulfide in a Soxhlet extractor.

Production

Antimony pentasulfide can be produced by the reaction of antimony with sulfur at a temperature between 250-400 °C in an inert atmosphere.

Uses

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

Physical chemistry

Like many sulfides, this compound liberates hydrogen sulfide upon treatment with strong acids like hydrochloric acid.[2]

6 HCl   +   Sb2S5   →   2 SbCl3   +   3 H2S   +   2 S

Analysis by Mössbauer spectroscopy indicates that this compound is a derivative antimony(III),[3] 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

  1. Arnold F. Holleman, Nils Wiberg: Lehrbuch der Anorganischen Chemie, 102nd edition, de Gruyter, Berlin 2007, p. 849, ISBN 978-3-11-017770-1.
  2. Strem MSDS
  3. 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.