| IUPAC name
| Other names
Sulfur dichloride dioxide
|Molar mass||134.9698 g/mol|
|Appearance|| Colorless liquid with a strong pungent odor|
Yellowish upon standing
|Density||1.67 g/cm3 (at 20 °C)|
|Melting point||−54.1 °C (−65.4 °F; 219.1 K)|
|Boiling point||69.4 °C (156.9 °F; 342.5 K)|
|Solubility|| Reacts with alcohols, amines, esters|
Miscible with glacial acetic acid, benzene, carbon tetrachloride, chloroform, dichloromethane, toluene
Soluble in hydrogen cyanide, liq. SO2, SnCl4
Immiscible with conc. sulfuric acid
|Vapor pressure||106.5 mmHg (at 20 °C)|
Std enthalpy of
|Safety data sheet||ScienceLab|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sulfuryl chloride is a water sensitive inorganic compound with the formula SO2Cl2. Sulfuryl chloride is sometimes confused with thionyl chloride (SOCl2), however the properties of the two chemicals are very different, as sulfuryl chloride is a source of chlorine, while thionyl chloride is a source of chloride ions.
- 2 H2O + SO2Cl2 → 2 HCl + H2SO4
It will chlorinate various organic compounds, such as alkanes, alkenes, alkynes, aromatics, ethers. It will also chlorinate the metal center from organometallic compounds, when it is in a lower oxidation state.
Sulfuryl chloride is a colorless to yellowish liquid, with a strong poignant smell reminiscent of burned matches. It readily hydrolyzes in water and reacts with some organic solvents.
Sulfuryl chloride is sold by various chemical suppliers, but it is extremely difficult for the amateur chemist to acquire it.
Sulfuryl chloride can be made by reacting sulfur dioxide and chlorine. The reaction is generally done without a solvent. Activated carbon is used as a catalyst, though UV light can speed up the reaction.
It can also be prepared by reacting disulfur dichloride with sulfur dioxide, at 170 °C. Elemental sulfur is produced as a byproduct.
- Make chlorobenzene
- Make alkyl chlorides
Sulfuryl is extremely corrosive and toxic. It fumes in air and hydrolyzes in water.
Sulfuryl chloride should be stored in glass bottles, preferably amber glass, away from any moisture, best in a corrosive chemicals cabinet.
Sulfuryl chloride can be neutralized with an alkaline solution. The reaction will release plenty of corrosive fumes, so it's best to do this outside.