Fluorophosphoric acid
Names | |
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IUPAC name
Fluorophosphonic acid
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Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.202.790 |
EC Number |
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100863 | |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
FH2O3P | |
Molar mass | 99.985 g/mol |
Appearance | colorless liquid |
Density | 1.818 g/cm3 |
Boiling point | decomp |
yes | |
Hazards | |
Main hazards | Causes skin burns and eye damage. |
GHS labelling: | |
Signal word
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Danger |
H301, H311, H314, H330 | |
P260, P264, P270, P271, P280, P284, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Fluorophosphoric acid is the inorganic compound with the formula H2PO3F. It is a colorless viscous liquid that solidified to a glass upon cooling.[1]
Preparation[]
Fluorophosphoric acid is produced commercially by treating phosphorus pentoxide with hydrogen fluoride. A less pure product can also be prepared by hydrolysis of phosphorus oxyfluoride, a reaction that first produces difluorophosphoric acid:[1]
- POF3 + H2O → HPO2F2 + HF
The next steps give monofluorophosphoric acid:
- HPO2F2 + H2O → H2PO3F + HF
Reactions[]
Fluorophosphoric acid is a dibasic acid, with pKas of 5.5 and around 8.5. The conjugate bases are the monofluorophosphates, which are hydrolytically robust.
References[]
- ^ a b Charles B. Lindahl, Tariq Mahmood (2000). "Fluorine Compounds, Inorganic, Phosphorus". Kirk‐Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1608151912091404.a01. ISBN 9780471484943.CS1 maint: uses authors parameter (link)
Wikimedia Commons has media related to Phosphoryl fluoride. |
Categories:
- Inorganic compound stubs
- Oxohalides
- Phosphorus halides
- Fluoro complexes