Disulfur dichloride

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Disulfur dichloride
Disulfur dichloride by Doug's Lab.jpg
Freshly prepared disulfur dichloride.
Names
IUPAC name
Disulfur dichloride
Systematic IUPAC name
Dichlorodisulfane
Other names
Bis(chloridosulfur)(S–S)
Chlorosulfane
Dimeric sulfenic chloride
Sulfur monochloride
Sulfur subchloride
Thiosulfurous dichloride
Properties
S2Cl2
Molar mass 135.04 g/mol
Appearance Light-amber to yellow-red oily liquid
Odor Pungent, suffocating
Density 1.688 g/cm3
Melting point −80 °C (−112 °F; 193 K)
Boiling point 137.1 °C (278.8 °F; 410.2 K)
Hydrolyzes
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)
Viscosity 0.978 cP
Thermochemistry
754.2 kJ/mol
Hazards
Safety data sheet CPCB
Flash point 118.5 °C
Related compounds
Related compounds
Sulfur dichloride
Sulfuryl chloride
Thionyl chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Disulfur dichloride is the chemical compound of sulfur and chlorine with the formula S2Cl2.

Properties

Chemical

Disulfur dichloride is sensitive to moist air, due to reaction with water:

2 S2Cl2 + 2 H2O → SO2 + 4 HCl + 3/8 S8

Physical

Pure disulfur dichloride is a yellow liquid, with a pugnant irritating odor, that smokes in air. It reacts with water and alcohols.

Availability

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).

Preparation

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.

Projects

Handling

Safety

Disulfur dichloride will react with water to release HCl and sulfur dioxide.

Storage

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.

Disposal

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.

See also

References

Relevant Sciencemadness threads