Thionyl chloride CAS NO. 7719-09-7 Intermediates Chemical raw materials 99% High Quality Factory Supply

Thionyl chloride

Thionyl chloride;Sulfurous oxychloride;Sulfurous dichloride;Sulfinyl chloride;Thionyl chloride (SOCl2);Sulfur chloride oxide (Cl2SO);Thionyl dichloride;Sulfur oxychloride (SOCl2);Sulfinyl dichloride;Sulfur oxychloride;Sulfur chloride oxide (SCl2O);2505209-14-1

7719-09-7

Cl2OS

InChIKey=FYSNRJHAOHDILO-UHFFFAOYSA-N

118.97

118.97

231-748-8

4A8YJA13N4

1409

1836

DTXSID3064778

Colorless to pale yellow or reddish liquid|Pale yellow to red liquid|Colorless to pale yellow, fuming, refractive liquid|Colorless to yellow to reddish liquid [Note: Fumes form when exposed to moist air]

28121095

Inorganic Salts

36.3

0.68

≤50(APHA) Liquid

1.638 g/cm³ @ Temp: 20 °C

-104.5 °C

76 °C @ Press: 760 Torr

105°C

1.593

Solubility in water: reaction.;Miscible with toluene, chloroform, benzene, carbon tetrachloride and diethyl ether.

Store at RT.

97 mm Hg ( 20 °C)

Relative vapour density (air = 1): 4.1

Inhalation-Rat LC50: 500 PPM/1 hour

Irritating; emit toxic sulfur dioxide, hydrogen chloride, chlorine and other gases in water; decompose toxic sulfur oxides and chloride fumes when heated

Closed containers may rupture violently when heated.

Suffocating odor

Decomposes at 140 °C|Fuming, refractive liquid; decomposes when heated above 140 °C. Hydrolyzed by water forming sulfur dioxide and hydrochloric acid.|Specific heat of liquid: 1.00 J/g-K|Dielectric constant: 9.05 at 20 °C

Emits dense corrosive fumes in moist air. Violently reacts with water to liberate hydrochloric acid and sulfur dioxide [NFPA 10th ed. 1991]. Thionyl chloride reacts vigorously with water to generate gaseous HCl and SO2. Based on a scenario where the chemical is spilled into an excess of water (at least 5 fold excess of water), half of the maximum theoretical yield of Sulfur Dioxide gas will be created in 0.25 minutes. Experimental details are in the following: "Development of the Table of Initial Isolation and Protective Distances for the 2008 Emergency Response Guidebook", ANL/DIS-09-2, D.F. Brown, H.M. Hartmann, W.A. Freeman, and W.D. Haney, Argonne National Laboratory, Argonne, Illinois, June 2009.

Acyl Halides, Sulfonyl Halides, and Chloroformates

Water-Reactive

THIONYL CHLORIDE reacts, potentially explosively, with dimethyl sulfoxide or dimethylformamide containing traces of iron or zinc [Spitulnik, M. J., Chem. Eng. News, 1977, 55(31), p. 31]. Undergoes violent reactions with bases (ammonia, sodium hydroxide, potassium hydroxide, amines), alkali metals (sodium, potassium), esters (ethyl acetate), toluene mixed with ethanol / water [Bretherick, 5th ed., 1995, p. 1325]. Has an expansion ratio from gas to liquid of nearly 1000:1. Hence may cause an explosion if heated while contained [MCA Case History No. 1808]. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291]. Perchloric acid ignites on contact with sulfinyl chloride. (Bailar, 1973, Vol. 2, 1442). SOCl2 reacts with esters, such as ethyl acetate, forming toxic SO2 gas and water soluble/toxic acyl chlorides, catalyzed by Fe or Zn (Spagnuolo, C.J. et al. 1992. Chemical and Engineering News 70(22):2.).

Noncombustible Liquid

The vapour is heavier than air.

31.0 kJ/mol