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CAS Number: 463-58-1
Sum Formula: COS
German Synonyms: Kohlenstoffoxidsulfid | Kohlenoxidsulfid | Carbonylsulfid | Kohlenstoffoxidsulfid(COS)
English Synonyms: Carbon oxide sulfide | Carbon oxysulfide | Carbonyl sulfide | Carbon oxide sulfide (COS)
EC Number: 207-340-0
Properties: flammable, gas
Explosion Group: IIA
Structural Formula Carbon oxide sulfide (COS)

Disclaimer: The CLP/GHS classification is not regularly updated in Chemsafe. For up-to-date information, please use the ECHA database. ( https://echa.europa.eu/en/information-on-chemicals )

Boiling point
1 1990 Nabert, K.; Schön, G. -50 °C UTI: 5510-025-002/20111005
UTI: 5510-025-002/20111005;
Line no Boiling temperature Critical temperature Melting temperature Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -50 °C 105 °C -139 °C 2.07 60.1 g/mol
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
2 2016 BAM -50.2 °C UTI: 5001-015-002/20111005
UTI: 5001-015-002/20111005;
Line no Melting temperature Boiling temperature Molar mass Relative gas density
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -138.8 °C -50.2 °C 60.075 g/mol 2.074
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Critical density
1 Critical Data 2016 BAM 0.449 kg/L UTI: 5001-015-003/20111005
Critical Data
UTI: 5001-015-003/20111005;
Line no Critical temperature Critical pressure Critical density
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 102 °C 58.8 bar 0.449 kg/L
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Critical point
1 1990 Nabert, K.; Schön, G. 105 °C UTI: 5510-025-002/20111005
UTI: 5510-025-002/20111005;
Line no Boiling temperature Critical temperature Melting temperature Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -50 °C 105 °C -139 °C 2.07 60.1 g/mol
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
2 Critical Data 2016 BAM 102 °C UTI: 5001-015-003/20111005
Critical Data
UTI: 5001-015-003/20111005;
Line no Critical temperature Critical pressure Critical density
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 102 °C 58.8 bar 0.449 kg/L
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Melting point
1 1990 Nabert, K.; Schön, G. -139 °C UTI: 5510-025-002/20111005
UTI: 5510-025-002/20111005;
Line no Boiling temperature Critical temperature Melting temperature Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -50 °C 105 °C -139 °C 2.07 60.1 g/mol
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
2 2016 BAM -138.8 °C UTI: 5001-015-002/20111005
UTI: 5001-015-002/20111005;
Line no Melting temperature Boiling temperature Molar mass Relative gas density
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -138.8 °C -50.2 °C 60.075 g/mol 2.074
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Molar mass
1 1990 Nabert, K.; Schön, G. 60.1 g/mol UTI: 5510-025-002/20111005
UTI: 5510-025-002/20111005;
Line no Boiling temperature Critical temperature Melting temperature Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -50 °C 105 °C -139 °C 2.07 60.1 g/mol
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
2 2016 BAM 60.075 g/mol UTI: 5001-015-002/20111005
UTI: 5001-015-002/20111005;
Line no Melting temperature Boiling temperature Molar mass Relative gas density
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -138.8 °C -50.2 °C 60.075 g/mol 2.074
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Relative gas density
1 1990 Nabert, K.; Schön, G. 2.07 UTI: 5510-025-002/20111005
UTI: 5510-025-002/20111005;
Line no Boiling temperature Critical temperature Melting temperature Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -50 °C 105 °C -139 °C 2.07 60.1 g/mol
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
2 2016 BAM 2.074 UTI: 5001-015-002/20111005
UTI: 5001-015-002/20111005;
Line no Melting temperature Boiling temperature Molar mass Relative gas density
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -138.8 °C -50.2 °C 60.075 g/mol 2.074
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
  • The oxidizing agent is air with an oxygen content of 20.95 % by volume. In the data base it is usually not specified as mixture component. Exceptions are highlighted.
  • Pressure values are absolute, not gauge pressures.
  • Impurities can strongly influence characteristic safety data, particulary if the properties of the impurity considerably deviate from the respective properties of the pure substance.
  • Safety characteristics are only displayed if evaluated data are available.
  • Values can be cited by using the UTI number of the table (Uniform Table Identifier).
  • Color Codes:         recommended value             no recommendation               do not use value

Limiting value for flammability (Tci)
1 2016 BAM 6.5 Mol% UTI: 5009-042-001/20111005
UTI: 5009-042-001/20111005;
Line no Limiting value for flammability (Tci)
  • recommended value
  • EU-standard
  • property of pure substance
1 6.5 Mol%
Bibliographic data
Year 2016
Title Recommended Tci values of Gases for Determination of fire potential for the selection of cylinder valve outlets 4.6 Calculation method: ISO 10156:2008 (E) - Draft
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language ENGL
2 2008 6.5 Mol% UTI: 5537-042-001/20111005
UTI: 5537-042-001/20111005;
Line no Limiting value for flammability (Tci)
  • recommended value
  • EU-standard
  • property of pure substance
1 6.5 Mol%
Bibliographic data
Year 2008
Title Draft for the revision of ISO 10156 "Gas cylinders – Gas and gas mixture – Determination of fire potential and oxidizing ability"
Subtitle Table 2 —Tci and Li values of flammable gases and vapours
Publisher ISO
Institution ISO - International Organization for Standardization
Language ENGL
Explosion limits
Lower explosion limit
1 2016 BAM 6.5 Vol% UTI: 5001-015-001/20111005
UTI: 5001-015-001/20111005;
Line no Lower explosion limit Upper explosion limit Maximum experimental safe gap Stoichiometric fraction of combustible substance in mixture with air Stoichiometric fraction of combustible substance in mixture with oxygen
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 6.5 Vol% 29 Vol% 1.35 mm 6.5 Mol% 25 Mol%
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
2 1952 Coward, H. F.; Jones, G. W. 12 Vol% UTI: 5512-006-001/20111005
UTI: 5512-006-001/20111005;
Line no Lower explosion limit Upper explosion limit
  • property of pure substance
  • property of pure substance
1 12 Vol% [1] 29 Vol% [1]
[1] Closed or small vessels
Bibliographic data
Title Limits of Flammability of Gases and Vapors (Bulletin 503)
Author Coward, H. F.; Jones, G. W.
Year 1952
Abstract English Explosion limits of individual gases in air, oxygen and nitrous oxide.
Abstract German Explosionsgrenzen von reinen Gasen in Luft, Sauerstoff und Distickstoffoxid.
Document Number Coward/Jon
Institution U.S. Bureau of Mines
Publisher United States Government Printing Office
Publisher City Washington
Language ENGL
3 1990 Nabert, K.; Schön, G. 160 g/m3 ± 10 % UTI: 5510-025-001/20111005
UTI: 5510-025-001/20111005;
Line no Lower explosion limit Lower explosion limit Upper explosion limit Upper explosion limit
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
1 160 g/m3 ± 10 % ⚠ 6.5 Vol% ± 10 % 730 g/m3 ± 5 % ⚠ 29 Vol% ± 5 %
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
4 1990 Nabert, K.; Schön, G. 6.5 Vol% ± 10 % UTI: 5510-025-001/20111005
UTI: 5510-025-001/20111005;
Line no Lower explosion limit Lower explosion limit Upper explosion limit Upper explosion limit
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
1 160 g/m3 ± 10 % ⚠ 6.5 Vol% ± 10 % 730 g/m3 ± 5 % ⚠ 29 Vol% ± 5 %
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
Upper explosion limit
1 2016 BAM 29 Vol% UTI: 5001-015-001/20111005
UTI: 5001-015-001/20111005;
Line no Lower explosion limit Upper explosion limit Maximum experimental safe gap Stoichiometric fraction of combustible substance in mixture with air Stoichiometric fraction of combustible substance in mixture with oxygen
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 6.5 Vol% 29 Vol% 1.35 mm 6.5 Mol% 25 Mol%
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
2 1952 Coward, H. F.; Jones, G. W. 29 Vol% UTI: 5512-006-001/20111005
UTI: 5512-006-001/20111005;
Line no Lower explosion limit Upper explosion limit
  • property of pure substance
  • property of pure substance
1 12 Vol% [1] 29 Vol% [1]
[1] Closed or small vessels
Bibliographic data
Title Limits of Flammability of Gases and Vapors (Bulletin 503)
Author Coward, H. F.; Jones, G. W.
Year 1952
Abstract English Explosion limits of individual gases in air, oxygen and nitrous oxide.
Abstract German Explosionsgrenzen von reinen Gasen in Luft, Sauerstoff und Distickstoffoxid.
Document Number Coward/Jon
Institution U.S. Bureau of Mines
Publisher United States Government Printing Office
Publisher City Washington
Language ENGL
3 1990 Nabert, K.; Schön, G. 730 g/m3 ± 5 % UTI: 5510-025-001/20111005
UTI: 5510-025-001/20111005;
Line no Lower explosion limit Lower explosion limit Upper explosion limit Upper explosion limit
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
1 160 g/m3 ± 10 % ⚠ 6.5 Vol% ± 10 % 730 g/m3 ± 5 % ⚠ 29 Vol% ± 5 %
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
4 1990 Nabert, K.; Schön, G. 29 Vol% ± 5 % UTI: 5510-025-001/20111005
UTI: 5510-025-001/20111005;
Line no Lower explosion limit Lower explosion limit Upper explosion limit Upper explosion limit
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
  • at atmospheric pressure and room temperature
  • according to german standard
  • property of pure substance
  • according to german standard
  • property of pure substance
1 160 g/m3 ± 10 % ⚠ 6.5 Vol% ± 10 % 730 g/m3 ± 5 % ⚠ 29 Vol% ± 5 %
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (with 6. Supplement)
Author Nabert, K.; Schön, G.
Year 1990
Publisher Deutscher Eichverlag;Braunschweig (Pub.)
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Abstract German Sicherheitstechnische Kenngrößen von ca. 1000 Gasen und Dämpfen: Explosionsgrenzen, Zündtemperaturen, Flammpunkte, Explosionsdrücke.
Language GERM
Maximum experimental safe gap
1 2016 BAM 1.35 mm UTI: 5001-015-001/20111005
UTI: 5001-015-001/20111005;
Line no Lower explosion limit Upper explosion limit Maximum experimental safe gap Stoichiometric fraction of combustible substance in mixture with air Stoichiometric fraction of combustible substance in mixture with oxygen
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 6.5 Vol% 29 Vol% 1.35 mm 6.5 Mol% 25 Mol%
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Stoichiometric fraction of combustible substance in mixture with air
1 2016 BAM 6.5 Mol% UTI: 5001-015-001/20111005
UTI: 5001-015-001/20111005;
Line no Lower explosion limit Upper explosion limit Maximum experimental safe gap Stoichiometric fraction of combustible substance in mixture with air Stoichiometric fraction of combustible substance in mixture with oxygen
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 6.5 Vol% 29 Vol% 1.35 mm 6.5 Mol% 25 Mol%
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM
Stoichiometric fraction of combustible substance in mixture with oxygen
1 2016 BAM 25 Mol% UTI: 5001-015-001/20111005
UTI: 5001-015-001/20111005;
Line no Lower explosion limit Upper explosion limit Maximum experimental safe gap Stoichiometric fraction of combustible substance in mixture with air Stoichiometric fraction of combustible substance in mixture with oxygen
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 6.5 Vol% 29 Vol% 1.35 mm 6.5 Mol% 25 Mol%
Bibliographic data
Year 2016
Title Recommended Safety Characteristics and Classifications of Flammable Gases and Gas Mixtures
Database BAM
Publisher Datenbank BAM-Projekt CHEMSAFE
Language GERM

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