Thionyl chloride an inorganic compound, is a moderately volatile, colourless to pale yellow liquid with a pungent odour. It is toxic, reacts with water, and is also listed under the Chemical Weapons Convention as it may be used for the production of chemical weapons.

The major industrial synthesis involves the reaction of sulfur trioxide and sulfur dichloride.

SynonymsThionyl dichloride
Sulfinyl chloride
Sulfur chloride oxide
Sulfur oxychloride
Sulfurous dichloride
Sulfurous oxychloride
CAS no.7719-09-7
EINECS no.231-748-8
Molecular formulaSOCl2
Molecular weight119


Here are some important uses of Thionyl chloride.
It is primarily utilised for the manufacturing of iso-carbophos, propargite tetramisole hydrochloride, indomethacin, and vitamin A in the pharmaceutical, pesticide, and dye industries.
Chlorination of alcoholic hydroxyl groups, carboxylic acid chlorination, acid anhydride chlorination, and chlorine displacement of organic sulfonic acid or carboxylic acid are all examples of chlorinating agents for organic synthesis.
It’s also used to make acyl chloride and pharmaceutical intermediates like tetramisole hydrochloride and synthomycin palmitate.
It can also be used as a solvent or a dehydrating agent.


AppearanceColourless to pale yellow liquid
OdorSuffocating odor
Purity%Min 99.6
Sulphur Chloride (as SCl2 +S2Cl2)%Max 0.1
Sulphuryl Chloride (as SO2Cl2+ SO3)%Max 0.1
Sulphur Dioxide (as SO2)%Max 0.3
IronppmMax 0.2
Residue on ignition%Max 0.01
Distillation range°C95% distills between 74.0 – 78.0
Specific Gravity (at 20°C)1.62 – 1.64

300 kg UN approved drum.

Keep in a tightly closed container, stored in a cool, dry, ventilated area.

REACH Status
Thionyl chloride offered by ExSyn is registered under EU REACH regulations.

No matter the quantity you need, our exceptional quality and service will make ExSyn your supplier of choice! If you need any additional information or SDS, please contact us.

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