The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Carbonyl Sulfide

COS, a higly flammable, colorless, odorless gas that liquifies at – 50.2°C and freezes at – 138.2°C. Carbonyl sulfide is readily soluble in carbon disulfide, toluene, and alcohol but somewhat less soluble in water. It is gradually decomposed by water to form CO₂ and H₂S. In the absence of moisture, carbonyl sulfide is stable. Upon heating it decomposes:

2COS = CO₂ + CS₂ and 2COS = 2CO + 2S

Carbonyl sulfide is obtained by passing a mixture of sulfur vapor and carbon monoxide through a heated tube:

S + CO = COS

It is obtained in pure form by the action of acids on ammonium thiocarbamate, CO(NH₂)(SNH₄). Carbonyl sulfide is used in the industrial production of urea.

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References in periodicals archive

Organic sulfur contains carbonyl sulfide (COS), carbon disulfide ([CS.sub.2]), thiophene, mercaptan, and so forth [1].

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(14.) MSDS: Carbon Dioxide, available at http://www2.hazard.com/ msds/mf/cards/file/0021/html (accessed September 1, 2009; MSDS: Carbon Monoxide, available at http://www2.hazard.com/msds/mf/cards/file/0023/html (accessed September 1, 2009); MSDS: Carbonyl Sulfide, available at http:// www2.hazard.com/smds/f2/eee/eeesn.html (accessed September 1, 2009); MSDS: Sulfur Dioxide, available at http://www2.hazard.com/smds/mf/cards/file/0074.html (accessed October 1, 2009); MSDS: Hydrogen Sulfide, available at http://www2.hazard.com/msds/f2/bvpbc.html (accessed September 1, 2009).

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Beverage-grade C[O.sub.2] can contain an array of impurities, including sulfur gases (carbonyl sulfide, hydrogen sulfide and sulfur dioxide), hydrocarbons (acetaldehyde, benzene and light hydrocarbons), oxygen and moisture.

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1, 2002) to two NIST scientists for a process that selectively removes carbonyl sulfide, a potentially problematic impurity, from liquefied petroleum gas (LPG).

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The emissions may be carbon disulfide ([CS.sub.2]) and carbon oxysulfide (also known as carbonyl sulfide, formula COS).

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