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Freshly prepared disulfur dichloride.
| IUPAC name
| Systematic IUPAC name
| Other names
Dimeric sulfenic chloride
|Molar mass||135.04 g/mol|
|Appearance||Light-amber to yellow-red oily liquid|
|Melting point||−80 °C (−112 °F; 193 K)|
|Boiling point||137.1 °C (278.8 °F; 410.2 K)|
|Solubility||Soluble in amyl acetate, benzene, bromine, bromoacetic acid, carbon tetrachloride, chloroform, diethyl ether, ethanol, fuming cold HNO3, liq. chlorine, liq. SO2, tin(IV) chloride,|
|Vapor pressure||7 mmHg (20 °C)|
Std enthalpy of
|Safety data sheet||CPCB|
|Flash point||118.5 °C|
| Sulfur dichloride|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Disulfur dichloride is the chemical compound of sulfur and chlorine with the formula S2Cl2.
Disulfur dichloride is sensitive to moist air, due to reaction with water:
- 2 S2Cl2 + 2 H2O → SO2 + 4 HCl + 3/8 S8
Pure disulfur dichloride is a yellow liquid, with a pugnant irritating odor, that smokes in air. It reacts with water and alcohols.
Disulfur dichloride can be purchased from chemical supplier, however due to it's hazardous nature, it cannot be bought by individuals.
Disulfur dichloride is listed in Schedule 3 Part B - Precursor Chemicals of the Chemical Weapons Convention (CWC) and its production, sale or consumption may be subject to control by the OPCW (Organisation for the Prohibition of Chemical Weapons).
Disulfur dichloride can be prepared by bubbling dry chlorine through molten sulfur. Direct chlorination of powdered sulfur also works with lower efficiency. In either case distillation is required for purification.
Disulfur dichloride will react with water to release HCl and sulfur dioxide.
Disulfur dichloride should be stored in sealed bottles in a special cabinet. Ground glass is inappropriate as escaping vapour reacts with atmospheric air, depositing solid sulfur in the glass joints, gluing them together.
Disulfur dichloride can be neutralized by mixing it with a basic solution. Slaked lime is a very good and cheap neutralizing agent. Since there will be lots of splashing, do this outside or under a fumehood.