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Topic summary

Disulfur dichloride

Disulfur dichloride
Names IUPAC names
Disulfur dichloride
Dichlorodisulfane
Systematic IUPAC name
Chlorosulfanyl thiohypochlorite
Other names
  • Bis[chloridosulfur](S–S)
  • Dimeric sulfenic chloride
  • Sulfur monochloride (incorrect name)
Identifiers
3D model (JSmol)
ChemSpider
DrugBank
ECHA InfoCard100.030.021EC Number
  • 233-036-2
MeSHSulfur+monochloride
RTECS number
  • WS4300000
UNII
UN number3390
  • InChI=1S/Cl2S2/c1-3-4-2
    Key: PXJJSXABGXMUSU-UHFFFAOYSA-N
  • InChI=1/Cl2S2/c1-3-4-2
    Key: PXJJSXABGXMUSU-UHFFFAOYAK
  • ClSSCl
Properties S2Cl2Molar mass135.02 g·mol Appearance Light-amber to yellow-red, oily liquid Odorpungent, nauseating, irritating Density1.688 g/cm Melting point−80 °C (−112 °F; 193 K) Boiling point137.1 °C (278.8 °F; 410.2 K) Decomposes, with loss of HClSolubilitySoluble in ethanol, benzene, ether, THF, chloroform, CCl4Vapor pressure7 mmHg (20 °C) −62.2·10 cm/mol 1.658 Structure C22 at sulfur atoms gauche1.60 DHazards GHS labelling: DangerH301, H314, H332, H400P260, P264, P270, P271, P273, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P330, P363, P391, P405, P501NFPA 704 (fire diamond)
2
1
1
Flash point118.5 °C (245.3 °F; 391.6 K) 234 °C (453 °F; 507 K) Lethal dose or concentration (LD, LC): 150 ppm (mouse, 1 min) (1 ppm = 5.52 mg/m) NIOSH (US health exposure limits):
PEL (Permissible)
TWA 1 ppm (5.52 mg/m)
REL (Recommended)
C 1 ppm (5.52 mg/m)
IDLH (Immediate danger)
5 ppm (1 ppm = 5.52 mg/m) Safety data sheet (SDS) ICSC 0958Related compounds
Related sulfur chlorides/oxychlorides
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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Disulfur dichloride (or disulphur dichloride by the British English spelling) is the inorganic compound of sulfur and chlorine with the formulaS2Cl2. It is an amber oily liquid.

Sometimes, this compound is incorrectly named sulfur monochloride (or sulphur monochloride by the British English spelling), the name implied by its empirical formula SCl.

S2Cl2 has the structure implied by the formula Cl−S−S−Cl, wherein the dihedral angle between the Cl−S−S and S−S−Cl planes is 85.2°. This structure is referred to as gauche, and is akin to that for H2O2. A rare isomer of S2Cl2 is S=SCl2 (thiothionyl chloride); this isomer forms transiently when S2Cl2 is exposed to UV-radiation (see thiosulfoxides).

Wikipedia source