How flammable is carbon disulfide

Carbon disulfide (carbon disulfide)

Author: Hans Lohninger

CAS no.75-15-0
Molecular weight76.14 amu
Melting point-111.6 ° C
boiling point46.5 ° C
density1.26 g / cm3
Refractive index1.627
Flash point-30 ° C
Ignition temperature95 ° C
Carbon disulfide or carbon disulfide, CS2, is a poisonous, highly flammable liquid. Pure carbon disulfide has an ethereal smell, but traces of impurities are sufficient to cause a disgusting odor. CS2 decomposes when exposed to light and forms yellow-orange-colored carbon polysulphides. CS2 has a high refractive index (comparable to glass) and a very low flash point (-30 ° C). It can ignite on hot steam pipes.

Carbon disulfide is produced by passing methane (natural gas) over sulfur at 600 ° C and aluminum oxide as a catalyst.

The combustion in air takes place with a very cold flame (200 ° C), carbon dioxide and sulfur dioxide are formed:

CS2 + 3 O2 CO2 + 2 SUN2

Carbon disulfide reacts with hot steam at 200 ° to carbon dioxide, carbonyl sulfide and hydrogen sulfide:

CS2 + H2O COS + H2S.
COS + H2O CO2 + H2S.

Carbon disulfide is required on a large scale by the chemical industry (e.g. as a solvent, for vulcanizing rubber, and above all for making viscose for cellulose fiber production).