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Trisulfane

Trisulfane is the inorganic compound with the formula H2S3. It is a pale yellow volatile liquid with a camphor-like odor. It decomposes readily to hydrogen sulfide and elemental sulfur. It is produced by distillation of the polysulfane oil obtained by acidification of polysulfide salts.

Last revised
Jul 26, 2026
Read time
≈ 1 min
Length
248 w
Citations
3
Source
Wikipedia ↗
Trisulfane
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Names
Systematic IUPAC name
Trisulfane1
Identifiers
3D model (JSmol)
3903006
ChEBI
ChEMBL
ChemSpider
25473
  • InChI=1S/H2S3/c1-3-2/h1-2H checkY
    Key: KBMBVTRWEAAZEY-UHFFFAOYSA-N checkY
  • SSS
Properties
H2S3
Molar mass 98.20 g·mol−1
Appearance yellow liquid
Odor camphor-like
Density 1.495 g/cm3 (15 °C)2
Melting point −53 °C (−63 °F; 220 K)
Boiling point 170 °C (338 °F; 443 K)
low
log P 1.237
Acidity (pKa) 5.826
Basicity (pKb) 8.171
Related compounds
Related isoelectronic
 Trioxidane
Sulfoxylic acid
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Trisulfane is the inorganic compound with the formula H2S3. It is a pale yellow volatile liquid with a camphor-like odor. It decomposes readily to hydrogen sulfide (H2S) and elemental sulfur. It is produced by distillation of the polysulfane oil obtained by acidification of polysulfide salts.3

References

References

  1. "trisulfane (CHEBI:50365)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute. 18 August 2008. Main. Retrieved 27 September 2011.
  2. Feher, Franz; Baudler, Marianne. Chemistry of sulfur. III. The preparation and properties of hydrogen trisulfide. Zeitschrift für Anorganische Chemie, 1947. 254: 251-254. ISSN: 0372-7874.
  3. R. Steudel "Inorganic Polysulfanes H2Sn with n > 1" in Elemental Sulfur and Sulfur-Rich Compounds II (Topics in Current Chemistry) 2003, Volume 231, pp 99-125. doi:10.1007/b13182