Carbonyl sulfide

Carbonyl sulfide is a colorless gas with the linear formula OCS. Normally present in the atmosphere at low concentrations, carbonyl sulfide is the most abundant sulfur compound naturally present in the atmosphere, at concentrations of around 500 parts per trillion on average.

Chemical properties

Carbonyl sulfide is a linear molecule consisting of a carbon atom, an oxygen atom, and a sulfur atom. The molecule has a dipole moment due to the electronegativity difference between the sulfur and oxygen atoms. The molecule is stable and has a boiling point of -50.2 degrees Celsius.

Natural occurrence

Carbonyl sulfide is naturally present in the atmosphere, where it is the most abundant sulfur compound. It is also found in volcanic emissions and in some plants. The compound is also produced by the reaction of carbon monoxide and sulfur at high temperatures.

Industrial uses

In industry, carbonyl sulfide is used as a precursor to thiophene and other sulfur-containing organic compounds. It is also used in the production of urethane polymers and as a sulfur source in the manufacture of synthetic fibers.

Health effects

Exposure to carbonyl sulfide can cause eye and respiratory irritation, headache, nausea, and vomiting. Long-term exposure can lead to lung damage and neurological effects.

See also

• Carbon disulfide
• Carbon monoxide
• Sulfur