noun[mass noun] Chemistry
A crystalline acid obtained by the reaction of phosphorus trioxide with water.
- A dibasic acid; chemical formula: HPO(OH)2
- The phosphoric or phosphonic acid ester formed with the enzyme is extremely stable and is hydrolyzed very slowly.
- A Hoffman rearrangement employing sodium hypobromite yielded the amine which was acid hydrolysed to obtain crude 2-aminoindan - 2 - phosphonic acid.
- The abscission process was also induced in vivo by embrioctomy or 2-chloroethyl phosphonic acid treatment in fruitlets and by deblading in leaves.
Late 19th century: phosphonic from phospho- 'relating to phosphorus', on the pattern of sulphonic.
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