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CAS Number: 7664-39-3
Sum Formula: FH
German Synonyms: Hydrogenfluorid | Fluorwasserstoffgas | Fluorwasserstoff
English Synonyms: Hydrofluoric acid | Fluorhydric acid | Hydrofluoride | Hydrogen fluoride
EC Number: 231-634-8
Properties: corrosive, gas, toxic
Structural Formula Hydrofluoric acid

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 )

GHS Hazard and Category:
  • Acute Tox. 2: acute toxicity by inhalation, category 2
  • Acute Tox. 1: acute dermal toxicity, category 1
  • Acute Tox. 2: acute oral toxicity, category 2
  • Skin Corr. 1A: skin corrosion, category 1A
GHS Pictogram:
pictogram toxic
pictogram corrosive





GHS Signal Word: Danger
GHS Hazard Statement:
  • H300: Fatal if swallowed.
  • H310: Fatal in contact with skin.
  • H314: Causes severe skin burns and eye damage.
  • H330: Fatal if inhaled.

Boiling point
1 2007 BAM 19.5 °C UTI: 5592-022-002/20111005
UTI: 5592-022-002/20111005;
Line no Boiling temperature
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 19.5 °C
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
2 2016 BAM 19.5 °C UTI: 5001-051-002/20111005
UTI: 5001-051-002/20111005;
Line no Boiling temperature Relative gas density
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
1 19.5 °C 0.71
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 1980 Braker, William; Mossman, Allen L. 0.29 g/cm3 UTI: 5593-004-001/20111005
UTI: 5593-004-001/20111005;
Line no Critical density
  • defined value
  • property of pure substance
1 0.29 g/cm3
Bibliographic data
Title Matheson Gas Data Book
Author Braker, William; Mossman, Allen L.
Year 1980
Publisher Matheson
ISBN / ISSN 978-9992670378
Abstract English Physical properties of gases.
Abstract German Physikalische Eigenschaften von Gasen
711
Language ENGL
2 Critical Data 2016 BAM 0.29 g/cm3 UTI: 5001-051-001/20111005
Critical Data
UTI: 5001-051-001/20111005;
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
1 188 °C 6485 kPa 0.29 g/cm3
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 Critical Data 2007 BAM 188 °C UTI: 5592-022-001/20111005
Critical Data
UTI: 5592-022-001/20111005;
Line no Critical temperature Critical pressure
  • defined value
  • property of pure substance
  • defined value
  • property of pure substance
1 188 °C 6485 kPa
Bibliographic data
Year 2007
Title Gas Encyclopedia
Database BAM
URL https://encyclopedia.airliquide.com/
Language ENGL
2 Critical Data 2016 BAM 188 °C UTI: 5001-051-001/20111005
Critical Data
UTI: 5001-051-001/20111005;
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
1 188 °C 6485 kPa 0.29 g/cm3
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 2006 0.71 UTI: 5594-043-001/20111005
UTI: 5594-043-001/20111005;
Line no Relative gas density
  • defined value
  • property of pure substance
1 0.71
Bibliographic data
Year 2006
Title DIN EN ISO 14912 Gas analysis - Conversion of gas mixture composition data (ISO 14912 :2003) German version EN ISO 14912:2006
Institution DIN,Deutsches Institut für Normung e.V.
Language ENGL
2 2016 BAM 0.71 UTI: 5001-051-002/20111005
UTI: 5001-051-002/20111005;
Line no Boiling temperature Relative gas density
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • defined value
  • property of pure substance
1 19.5 °C 0.71
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

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