Thionyl chloride

  • Schwefligsäurechlorid
  • Chlorthionyl
  • Thionyldichlorid

Colorless, highly refractive, suffocating smelling liquid

Liquid

1.64 g · cm -3 ( 20 ° C)

-104.5 ° C

75.3 ° C

129 hPa ( 20 ° C)

Partly violent decomposition with water and alcohols

1.518 at 20 ° C.

Risk

  • 500-1274 ppm · h 1 ( LC50, rat, inh. )
  • 540 ppm x 4 h ( LC50, rat, inh. )

Template: Infobox chemical / molecular formula search available

Thionyl chloride is a highly refractive colorless liquid, the dichloride of sulfur dioxide.

Properties

Thionyl chloride reacts violently with water and bases, as well as with some alcohols. When heated above 140 ° C it decomposes into sulfur dioxide, chlorine and sulfur.

Reaction with water:

Production

Thionyl chloride is in the laboratory by introducing sulfur trioxide to sulfur or sulfur dioxide by passing over phosphorus pentachloride forth:

Use

  • In lithium - thionyl chloride batteries as a cathode material
  • Thionyl chloride is industrially used in the preparation of the following substances: aromatic sulfonyl chlorides
  • Carboxylic acid chlorides from carboxylic acids:
  • Alkyl chlorides of aliphatic alcohols:
CAS registry number Vapor pressure Dangerous Substances Directive (67/548/EEC) Sulfur dichloride
184713
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