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Names | |||
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Other names
Fluorane
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Identifiers | |||
CAS Number
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3D model (JSmol)
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ChEBI |
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ChemSpider |
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ECHA InfoCard | 100.028.759 | ||
KEGG |
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PubChem CID
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RTECS number | MW7875000 | ||
UNII |
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InChI
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SMILES
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Properties | |||
Chemical formula
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HF | ||
Molar mass | 20.01 g·mol−1 | ||
Appearance | colourless gas or colourless liquid (below 19.5 °C) | ||
Density | 1.15 g/L, gas (25 °C) 0.99 g/mL, liquid (19.5 °C) 1.663 g/mL, solid (–125 °C) |
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Melting point | −83.6 °C (−118.5 °F; 189.6 K) | ||
Boiling point | 19.5 °C (67.1 °F; 292.6 K) | ||
Solubility in water
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completely miscible (liquid) | ||
Vapor pressure | 783 mmHg (20 °C) | ||
Acidity (pKa) | 3.17 | ||
Conjugate acid | Fluoronium | ||
Conjugate base | Fluoride | ||
Refractive index (nD)
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1.00001 | ||
Structure | |||
Molecular shape
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Linear | ||
Dipole moment
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1.86 D | ||
Thermochemistry | |||
Std molar
entropy (S |
8.687 J/g K (gas) | ||
Std enthalpy of
formation (ΔfH |
−13.66 kJ/g (gas) −14.99 kJ/g (liquid) |
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Hazards | |||
NFPA 704 |
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0
4
1
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Lethal dose or concentration (LD, LC): | |||
LC50 (median concentration)
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1276 ppm (rat, 1 hr) 1774 ppm (monkey, 1 hr) 4327 ppm (guinea pig, 15 min) |
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LCLo (lowest published)
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313 ppm (rabbit, 7 hr) | ||
US health exposure limits (NIOSH): | |||
PEL (Permissible)
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TWA 3 ppm | ||
REL (Recommended)
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TWA 3 ppm (2.5 mg/m3) C 6 ppm (5 mg/m3) [15-minute] | ||
IDLH (Immediate danger)
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30 ppm | ||
Related compounds | |||
Other anions
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Hydrogen chloride Hydrogen bromide Hydrogen iodide Hydrogen astatide |
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Other cations
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Sodium fluoride Potassium fluoride Rubidium fluoride Caesium fluoride |
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Related compounds
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Water Ammonia |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
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Infobox references | |||