Input interpretation
![hydrogen fluoride](../image_source/aceb3c96d602983b9e4c78514dbf203d.png)
hydrogen fluoride
Chemical names and formulas
![formula | HF Hill formula | FH name | hydrogen fluoride alternate names | anhydrous hydrofluoric acid | anhydrous hydrogen fluoride | fluorane | hydrofluoride | hydron fluoride | rubigine mass fractions | F (fluorine) 95% | H (hydrogen) 5.04%](../image_source/823b94d88292db41e3522819eda3c1dc.png)
formula | HF Hill formula | FH name | hydrogen fluoride alternate names | anhydrous hydrofluoric acid | anhydrous hydrogen fluoride | fluorane | hydrofluoride | hydron fluoride | rubigine mass fractions | F (fluorine) 95% | H (hydrogen) 5.04%
Structure diagram
![Structure diagram](../image_source/e47e8c21bf41b99649e6d8538e9c0025.png)
Structure diagram
Basic properties
![molar mass | 20.006 g/mol phase | gas (at STP) melting point | -83.36 °C boiling point | 19.5 °C density | 8.18×10^-4 g/cm^3 (at 25 °C) solubility in water | miscible](../image_source/755bdbecbe08871b382438449766e57f.png)
molar mass | 20.006 g/mol phase | gas (at STP) melting point | -83.36 °C boiling point | 19.5 °C density | 8.18×10^-4 g/cm^3 (at 25 °C) solubility in water | miscible
Units
Gas properties (at STP)
![density | 8.18×10^-4 g/cm^3 (at 25 °C) vapor density | 1.27 (relative to air) molar volume | 24500 cm^3/mol refractive index | 1.00001 dynamic viscosity | 1.2571×10^-5 Pa s (at 20 °C)](../image_source/da0c2a023a67106f7f8d0419689bb297.png)
density | 8.18×10^-4 g/cm^3 (at 25 °C) vapor density | 1.27 (relative to air) molar volume | 24500 cm^3/mol refractive index | 1.00001 dynamic viscosity | 1.2571×10^-5 Pa s (at 20 °C)
Units
Thermodynamic properties
![specific free energy of formation Δ_fG° | gas | -13.77 kJ/g molar free energy of formation Δ_fG° | gas | -275.4 kJ/mol specific heat of formation Δ_fH° | gas | -13.66 kJ/g | liquid | -14.99 kJ/g molar heat of formation Δ_fH° | gas | -273.3 kJ/mol | liquid | -299.8 kJ/mol specific entropy S° | gas | 8.687 J/(g K) molar entropy S° | gas | 173.8 J/(mol K) molar heat of vaporization | 7.5 kJ/mol | specific heat of vaporization | 0.37 kJ/g | molar heat of fusion | 4.58 kJ/mol | specific heat of fusion | 0.229 kJ/g | critical temperature | 461 K | critical pressure | 6.48 MPa | (at STP)](../image_source/0da5ae65d8f95a4aaeee2749b38f7eea.png)
specific free energy of formation Δ_fG° | gas | -13.77 kJ/g molar free energy of formation Δ_fG° | gas | -275.4 kJ/mol specific heat of formation Δ_fH° | gas | -13.66 kJ/g | liquid | -14.99 kJ/g molar heat of formation Δ_fH° | gas | -273.3 kJ/mol | liquid | -299.8 kJ/mol specific entropy S° | gas | 8.687 J/(g K) molar entropy S° | gas | 173.8 J/(mol K) molar heat of vaporization | 7.5 kJ/mol | specific heat of vaporization | 0.37 kJ/g | molar heat of fusion | 4.58 kJ/mol | specific heat of fusion | 0.229 kJ/g | critical temperature | 461 K | critical pressure | 6.48 MPa | (at STP)
Chemical identifiers
![CAS number | 7664-39-3 PubChem CID number | 16211014 PubChem SID number | 24863720 SMILES identifier | F InChI identifier | InChI=1/FH/h1H/fF.H/h1h;/q-1;+1 RTECS number | MW7875000 MDL number | MFCD00011346](../image_source/fea3a2cf2ded0fb0241e956ab3c20c0e.png)
CAS number | 7664-39-3 PubChem CID number | 16211014 PubChem SID number | 24863720 SMILES identifier | F InChI identifier | InChI=1/FH/h1H/fF.H/h1h;/q-1;+1 RTECS number | MW7875000 MDL number | MFCD00011346
NFPA label
![NFPA label](../image_source/a6d59310b3fcd6330fe6458d8183ffa2.png)
NFPA label
![NFPA health rating | 4 NFPA fire rating | 0 NFPA reactivity rating | 1](../image_source/41d8ceb28663182fbacaa232da0afed8.png)
NFPA health rating | 4 NFPA fire rating | 0 NFPA reactivity rating | 1
Toxicity properties
![short-term exposure limit | 2.5 mg/m^3](../image_source/f77883da00bd41d8233cc21b25b1f64b.png)
short-term exposure limit | 2.5 mg/m^3
Units
Ion equivalents
![H^+ (hydrogen cation) | 1 F^- (fluoride anion) | 1](../image_source/7a2cb3878dc4043762f3d345bb872e4c.png)
H^+ (hydrogen cation) | 1 F^- (fluoride anion) | 1