Oxohalides

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. 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. (Wikipedia).

Difluorophosphoric acid
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Fluorophosphoric acid