Sulfur monochloride	Sulfur dichloride
Appearance	Yellow to orange fuming liquid	Red to yellow fuming lquid
Molecular Formula	S2Cl2	SCl2
Molecular Weight	135.03	99.53
Boiling Point	138°C	Decomposes at 59°C
Melting Point	-80°C	-121.5 to -61°C
Vapor Density	4.7
Liquid Density	1.6889	1.621
Vapor pressure	930 Pa	1420 Pa at 20°C
Not flammable

Also refer to 2000 Emergency Response Guidebook (ERG2000) Guide 137.

Health Hazards

Risk and Safety Phrases.

INDUSTRIAL/COMMERCIAL USES

Sulfur chlorides are versatile reagents for the introduction of sulfur or chlorine in synthetic organic and industrial chemistry. They are used in the preparation of additives for extreme pressure lubricants from phenols and in vulcanizing agents for natural and synthetic rubbers. They also played a role in the synthesis of insecticides, pharmaceuticals, and dyes. Synthesis of the chlorides is by the controlled reaction of chlorine gas with elemental sulfur.

COMMENTS

The manufacture of sulfur mustard using sulfur chloride is an extension of a common industrial reaction between sulfur monochloride and alkenes to give a number of commercially useful addition products. Sulfur chloride can also be used in the manufacture of thionyl chloride.