Hydrogen Fluoride - HF

Hydrogen fluoride is used in many applications and its most important use is in the chemical industry for the production of most fluorine-containing chemicals. 

Cement and glass industries are concerned of their HF releases. 

Hydrogen fluoride has a sharp penetrating odour. 

Properties

Molecular weight 20.006 g/mol

Gaseous phase Gas density (1.013 bar and 25 °C (77 °F)): 0.83 kg/m3

Liquid phase Boiling point (1.013 bar): 19.51 °C
 Liquid density (1.013 bar at boiling point): 959 kg/m3

Critical point Critical temperature: 188 °C
 Critical pressure: 64.85 bar