Cl2OS
118.97 g/mol
Industrial ChemicalDanger
THIONYL CHLORIDE
CAS7719-09-7EC231-748-8
Category
Industrial Chemical
Compound Class
Other
Primary Use
Chlorinating agent for acyl chlorides
Thionyl chloride is a colorless to yellow fuming liquid with a suffocating pungent odor. It is highly corrosive and toxic, and its primary significance is as a chlorinating agent used in the production of acyl chlorides.
Manufacture of herbicides, surfactants, drugs, dyes, and plasticsElectrolyte in lithium batteriesChlorinating agent for acyl chlorides
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Controlled substances
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CAS 7719-09-7
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Chemical intermediate for synthesis
Safety Reference
Danger
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H332Harmful if inhaled
H318Causes serious eye damage
H331Toxic if inhaled
H335May cause respiratory irritation
H315Causes skin irritation
H319Causes serious eye irritation
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H301Toxic if swallowed
H330Fatal if inhaled
H370Causes damage to organs
Customs Tariff Classification
The international HS code for THIONYL CHLORIDE (CAS 7719-09-7) is 2812.17.
HS code (international, 6-digit)
2812.17
EU CN code (8-digit)
2812 17 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
thionyl dichloride
InChIKey
FYSNRJHAOHDILO-UHFFFAOYSA-N
SMILES
O=S(Cl)Cl
Synonyms (30)
- Dichlorosulfoxide
- SULFOXIDE CHLORIDE
- Sulfinyl chloride
- Sulfinyl dichloride
- Sulfur chloride oxide
- Sulfur chloride oxide (Cl2SO)
- Sulfur oxychloride
- Sulfur oxychloride (socl2)
- Sulfurous dichloride
- Sulfurous oxychloride
- THIONYL CHLORIDE
- Thionyichloride
- Thionyl chloride (socl2)
- Thionyl chloride, puriss.
- Thionyl cloride
- Thionyl dichloride
- Thionylchlorid
- dichloridooxidosulfur
- sulfur dichloride oxide
- sulphinyl chloride
- thiony-chloride
- thionyl chlorie
- thionylchioride
- thionylchoride