Antimony pentasulfide

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Antimony pentasulfide
Names
Other names
Antimony red
Identifiers
3D model (
JSmol
)
ChEBI
ChemSpider
ECHA InfoCard
 100.013.869 Edit this at Wikidata
EC Number
  • 215-255-5
UNII
  • InChI=1S/5S.2Sb checkY
    Key: PPKVREKQVQREQD-UHFFFAOYSA-N checkY
  • S=[Sb](=S)S[Sb](=S)=S
Properties
Sb2S5
Molar mass 403.82 g·mol−1
Appearance Red powder
Density 4.12 g/cm 3
Melting point 135 °C (275 °F; 408 K) (decomposes)
insoluble
Solubility soluble in HCl, alkalis, ammonium hydrosulfide
Pharmacology
R05CA07 (WHO)
Hazards
GHS labelling:
GHS02: FlammableGHS07: Exclamation markGHS09: Environmental hazard
Warning
H228, H302, H332, H411
P210, P240, P241, P261, P264, P270, P271, P273, P280, P301+P312, P304+P312, P304+P340, P312, P330, P370+P378, P391, P501
Flash point flammable
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.5 mg/m3 (as Sb)[1]
REL (Recommended)
 TWA 0.5 mg/m3 (as Sb)[1]
Related compounds
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).
☒N verify (what is checkY☒N ?)

Antimony pentasulfide is an

nonstoichiometric compound with a variable composition. Its structure is unknown.[2] Commercial samples 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 from 250 to 400 °C in an inert atmosphere.

Uses

It may be used as a red

Schlippe's salt
, Na3SbS4·9H2O, which can be prepared according to the equation:

3 Na2S + Sb2S5 + 9 H2O → 2 Na3SbS4·9H2O

It is also used in the

rubber
to produce red rubber.

Physical chemistry

Like many

strong acids such as hydrochloric acid.[3]

6 HCl + Sb2S5 → 2 SbCl3 + 3 H2S + 2 S

Analysis by

antimony(V) chloride, upon acidification. It is, therefore, not analogous to the phosphorus(V) compound phosphorus pentasulfide
.

References

  1. ^ a b NIOSH Pocket Guide to Chemical Hazards. "#0036". National Institute for Occupational Safety and Health (NIOSH).
  2. ISBN 978-3-11-017770-1
    .
  3. ^ Strem MSDS
  4. doi:10.1016/0020-1650(69)80231-X
    .
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