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Carbonyl Sulfide

Carbonyl Sulfide is a colorless, poisonous, flammable gas. It is shipped as a liquefied gas

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Carbonyl Sulfide

Formula: COS

What is carbonyl sulfide?

Carbonyl sulfide is a colorless, poisonous, flammable gas.  It is shipped as a liquefied gas.  Carbonyl sulfide is used in the manufacture of organic compounds, as a synthesizer.

Does carbonyl sulfide Occur Naturally?

Carbonyl sulfide occurs naturally in the air, it is emitted from sulfurous water, soil, wet marshes, oceans, and volcanic gas.  Carbonyl sulfide is a part of the global sulfur cycle, the circulation of sulfur through nature. 



Further Specifications

Cylinder Sizes

  • Carbonyl sulfide (COS) is a small molecule that contains a carbonyl group (C=O) and a sulfur atom. It has several potential applications in the field of semiconductors, including:
  • Precursor for sulfur doping: Carbonyl sulfide can be used as a precursor for sulfur doping in semiconductors. Sulfur doping is a process in which a small amount of sulfur is introduced into a semiconductor material to modify its electronic properties. Carbonyl sulfide can be used as a source of sulfur for this process, as it can easily decompose to release sulfur.
  • Metal-organic chemical vapor deposition (MOCVD) of semiconductors: Carbonyl sulfide can be used as a source of sulfur in the MOCVD process of semiconductors. MOCVD is a technique used to deposit thin films of semiconductors onto a substrate, and carbonyl sulfide can be used as a sulfur source to modify the electronic properties of the deposited film.
  • Surface passivation: Carbonyl sulfide can be used as a passivation agent to protect semiconductor surfaces from contamination and oxidation. It can form a protective layer on the surface of semiconductors to prevent unwanted chemical reactions with the surrounding environment.
  • Gas sensing: Carbonyl sulfide can be used as a gas sensing material in semiconductors. It has been reported that carbonyl sulfide can be used as a sensing material to detect low concentrations of hydrogen sulfide gas in air.
Grade 3 Grade 4
Purity 99.9% 99.99%
Nitrogen < 300 ppmv < 20 ppmv
Oxygen < 100 ppmv < 10 ppmv
Carbon Dioxide <300 ppmv <20 ppmv
Carbon Monoxide <100 ppmv <20 ppmv
Methane < 5 ppmv
Water <100 ppmv < 10 ppmv
Hydrogen Sulfide <100 ppmv < 100 ppmv
Chemical & Physical Properties
Molecular Weight 60.08
Sp. Volume 6.44 cu.ft/lb
Pressure @ 70°F 152.52 psig
Valve Outlet CGA 330 DISS 722
Shipping Information
DOT Name Carbonyl Sulfide
Hazard Class 2.3, 2.1
DOT No. UN 2204
DOT Label Poison Gas, Flammable Gas
CAS No. 463-58-1
Cylinder Size Fill Weight (lb)
44L/Size 200 55

FAQs about Carbonyl Sulfide

Is carbonyl sulfide gas safe?

Carbonyl sulfide is a toxic and extremely flammable gas.  If not handled properly, carbonyl sulfide gas causes skin, eye, and respiratory irritation.  EFC’s culture of safety ensures that n-Butane is always handled properly, safely, and according to industry standards. 

What is carbonyl sulfide used for?

Carbonyl sulfide is used as a synthesis component in chemical reactions that produce other gases and chemicals that are sold. 

**Moisture level guaranteed only when Electronic Fluorocarbons prepares the cylinders.
All concentrations are on a mol/mol basis unless otherwise stated.
Product sold on the basis of total impurities. Individual impurities may vary slightly.

*This gas not available for purchase online.