Structure via PubChem · Public domain (PubChem)
thionyl chloride
Sign in to saveAlso known as sulfinyl chloride, sulfur chloride oxide, sulfurous dichloride, sulfurous oxychloride, thionyl dichloride, SOCl2, [SCl2O], sulfur dichloride oxide
chemical compound
Chemical data
- Formula
- Cl2OS
- Molecular weight
- 118.97 g/mol
- IUPAC name
- thionyl dichloride
- SMILES
- O=S(Cl)Cl
- InChIKey
- FYSNRJHAOHDILO-UHFFFAOYSA-N
- XLogP
- 1.5
- Polar surface area
- 36.3 Ų
- H-bond donors
- 0
- H-bond acceptors
- 2
- Formal charge
- 0
via PubChem
Wikidata facts
- Subclass of
- chemical compound
- Has part
- chlorine
- Mass
- 117.90469098
Show 11 more facts
- Commons category
- Thionyl chloride
- NIOSH Pocket Guide ID
- 0611
- density
- 1.64
- melting point
- -101
- boiling point
- 75.6
- vapor pressure
- 100
- ceiling exposure limit
- 5
- chemical formula
- Cl₂OS
- canonical SMILES
- O=S(Cl)Cl
- ionization energy
- 10.96
- electric dipole moment
- 1.45
via Wikidata · CC0
~14 min read
Encyclopedic overview
Thionyl chloride is an inorganic compound with the chemical formula SOCl2. It is a moderately volatile, colourless liquid with an unpleasant acrid odour. Thionyl chloride is primarily used as a chlorinating reagent, with approximately 45,000 tonnes (50,000 short tons) per year being produced during the early 1990s, but is occasionally also used as a solvent. 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.
Thionyl chloride is sometimes confused with sulfuryl chloride, SO2Cl2, but the properties of these compounds differ significantly. Sulfuryl chloride is a source of chlorine whereas thionyl chloride is a source of chloride ions.
Excerpted from Wikipedia’s “thionyl chloride” article, available under the CC BY-SA 4.0 licence.