Disulfur dichloride

  • Sulfur monochloride
  • Dichlorodisulfane
  • Chlorine sulfur
  • Sulfur ( I) chloride

Yellow to orange liquid malodor

Liquid

1.69 g · cm -3 ( 20 ° C)

-80 ° C

138 ° C

15 hPa ( 20 ° C)

  • Violent decomposition with water
  • Soluble in ethanol and diethyl ether

1.658 (20 ° C)

Risk

Not yet classified

131 mg · kg -1 ( LD50, rat, oral)

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Disulfur dichloride is a chemical compound selected from the group of chlorides, is used primarily as sulfidation and chlorination.

Production and representation

S2Cl2 is produced by chlorination of elemental sulfur:

With excess chlorine, the product sulfur reacts further:

Industrially, the chlorination is carried out continuously at 240 ° C. The by-product sulfur is converted by heating to reflux with addition of sulfur to sulfur monochloride.

Properties

The vapor pressure function is given by Antoine corresponding log10 (P) = A- ( B / ( T C )) ( P in bar, T in K) with A = 4.0648, B = 1417.43 and C = -61 685 in the temperature range 266-411 K. The clear yellow to orange liquid reacts violently with water to form a variety of products such as sulfur, hydrogen chloride, sulfur dioxide, hydrogen sulfide and thiosulfate. It has a viscosity of 0.9 mPa · s at 20 ° C. In the sulfur compound can be dissolved, and this is fitted to form a chain of SnCl2 with n = 2 to 100.

Disulfur dichloride is a sulfidation and chlorination agent, on the one hand as dissolved chlorine behaves, on the other hand with a plurality of ( organic ) compounds capable of forming disulfide bonds.

Use

Disulfur dichloride is used industrially for the production of:

  • Additives for extreme pressure lubricant and cutting oils
  • Rubber vulcanizing
  • Sulfur dichloride, sulfur tetrachloride, and thionyl chloride
  • Other organic sulfur compounds, which are in turn used for the preparation of pharmaceuticals, crop protection agents, dyes, and rubber
  • Chlorination of dicarboxylic acids, of, for example, oxalic acid ( ethanedioic acid ), oxalyl chloride to

It also serves as a catalyst in chlorination, such as chlorination of acetic acid.

Safety

Sulfur monochloride is a starting material for the production of chemical warfare agents and therefore is under export control.

CAS registry number PubChem Dangerous Substances Directive (67/548/EEC) Antoine equation Vulcanization
184693
de