Difluorophosphoric acid
Difluorophosphoric acid is an inorganic compound with the formula HPO2F2. It is a colorless liquid. The acid has limited applications, in part because it is thermally and hydrolytically unstable.[1]
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| Names | |
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| IUPAC name
difluorophosphinic acid | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.034.005  |
| EC Number |
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PubChem CID |
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| UN number | 1768 |
CompTox Dashboard (EPA) |
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| Properties | |
| F2HO2P | |
| Molar mass | 101.977 g·mol−1 |
| Appearance | colorless liquid |
| Density | 1.583 g/mL |
| Hazards | |
| GHS pictograms |  |
| GHS Signal word | Danger |
| H314 | |
| P260, P264, P280, P301+330+331, P303+361+353, P304+340, P305+351+338, P310, P321, P363, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
It is prepared by hydrolysis of phosphorus oxyfluoride:
- POF3 + H2O → HPO2F2 + HF
Further hydrolysis gives monofluorophosphoric acid:
- HPO2F2 + H2O → H2PO3F + HF
Complete hydrolysis gives phosphoric acid:
- H2PO3F + H2O → H3PO4 + HF
The salts of difluorophosphoric acid are known as difluorophosphates.
References
- Charles B. Lindahl, Tariq Mahmood (2000). "Fluorine Compounds, Inorganic, Phosphorus". Kirk‐Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1608151912091404.a01. ISBN 0471238961.CS1 maint: uses authors parameter (link)
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