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CAS Number: 7783-07-5
Sum Formula: H2Se
German Synonyms: Selenwasserstoff | Hydrogenselenid
English Synonyms: Selenium hydride | Hydrogen selenide
EC Index Number: 034-002-00-8
EC Number: 231-978-9
Properties: flammable, gas, poisonous
Structural Formula Hydrogen selenide

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 2003 BAM -42 °C UTI: 5560-010-001/20111005
UTI: 5560-010-001/20111005;
Line no Molar mass Melting temperature Boiling temperature Relative gas density
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
1 80.976 g/mol -65.7 °C -42 °C 2.8313
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
2 2007 BAM -41.4 °C UTI: 5592-054-002/20111005
UTI: 5592-054-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/mol
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
3 2016 BAM -41.4 °C UTI: 5001-083-002/20111005
UTI: 5001-083-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/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
Critical density
1 Critical Data 2003 BAM 0.76 kg/L UTI: 5560-010-002/20111005
Critical Data
UTI: 5560-010-002/20111005;
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
1 138 °C 89.2 bar 0.76 kg/L
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
Critical point
1 Critical Data 2003 BAM 138 °C UTI: 5560-010-002/20111005
Critical Data
UTI: 5560-010-002/20111005;
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
1 138 °C 89.2 bar 0.76 kg/L
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
2 2007 BAM 138 °C UTI: 5592-054-001/20111005
UTI: 5592-054-001/20111005;
Line no Critical temperature
  • defined value
  • property of pure substance
1 138 °C
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
3 2016 BAM 138 °C UTI: 5001-083-001/20111005
UTI: 5001-083-001/20111005;
Line no Critical temperature
  • defined value
  • property of pure substance
1 138 °C
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
Density
1 2003 BAM 101.3 kPa 0 °C 3.661 kg/m3 UTI: 5560-058-001/20111005
UTI: 5560-058-001/20111005;
Line no Temperature Pressure Density
  • Parameter of the measurement
  • property of pure substance
  • Parameter of the measurement
  • property of pure substance
  • defined value
  • property of pure substance
1 0 °C 101.3 kPa 3.661 kg/m3
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
2 2016 BAM 101.3 kPa 0 °C 3.661 kg/m3 UTI: 5016-043-001/20111005
UTI: 5016-043-001/20111005;
Line no Temperature Pressure Density
  • Parameter of the measurement
  • property of pure substance
  • Parameter of the measurement
  • property of pure substance
  • defined value
  • property of pure substance
1 0 °C 101.3 kPa 3.661 kg/m3
Bibliographic data
Year 2016
Title Recommended Densities of Pure Gases
Database BAM
Language GERM
Melting point
1 2003 BAM -65.7 °C UTI: 5560-010-001/20111005
UTI: 5560-010-001/20111005;
Line no Molar mass Melting temperature Boiling temperature Relative gas density
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
1 80.976 g/mol -65.7 °C -42 °C 2.8313
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
2 2007 BAM -66 °C UTI: 5592-054-002/20111005
UTI: 5592-054-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/mol
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
3 2016 BAM -66 °C UTI: 5001-083-002/20111005
UTI: 5001-083-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/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
Molar mass
1 2003 BAM 80.976 g/mol UTI: 5560-010-001/20111005
UTI: 5560-010-001/20111005;
Line no Molar mass Melting temperature Boiling temperature Relative gas density
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
1 80.976 g/mol -65.7 °C -42 °C 2.8313
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
2 2007 BAM 80.976 g/mol UTI: 5592-054-002/20111005
UTI: 5592-054-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/mol
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
3 2016 BAM 80.976 g/mol UTI: 5001-083-002/20111005
UTI: 5001-083-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/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
Relative gas density
1 2003 BAM 2.8313 UTI: 5560-010-001/20111005
UTI: 5560-010-001/20111005;
Line no Molar mass Melting temperature Boiling temperature Relative gas density
  • defined value
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
1 80.976 g/mol -65.7 °C -42 °C 2.8313
Bibliographic data
Year 2003
Title Gasatlas
Database BAM
Language GERM
2 2007 BAM 2.8 UTI: 5592-054-002/20111005
UTI: 5592-054-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/mol
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
3 2016 BAM 2.8 UTI: 5001-083-002/20111005
UTI: 5001-083-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/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
Vapor pressure
1 2007 BAM 9.5 bar UTI: 5592-054-002/20111005
UTI: 5592-054-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/mol
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
2 2016 BAM 9.5 bar UTI: 5001-083-002/20111005
UTI: 5001-083-002/20111005;
Line no Melting temperature Boiling temperature Vapor pressure Relative gas density Molar mass
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • at room temperature
  • property of pure substance
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 -66 °C -41.4 °C 9.5 bar 2.8 80.976 g/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
  • 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 4 Mol% UTI: 5009-056-001/20111005
UTI: 5009-056-001/20111005;
Line no Limiting value for flammability (Tci)
  • recommended value
  • EU-standard
  • property of pure substance
1 4 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 4 Mol% UTI: 5537-056-001/20111005
UTI: 5537-056-001/20111005;
Line no Limiting value for flammability (Tci)
  • recommended value
  • EU-standard
  • property of pure substance
1 4 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

No entry in database