hyponitrous, a. Chem.
(hɪpəʊ-, haɪpəʊˈnaɪtrəs)
[f. hypo- 5 + nitrous. Cf. F. hyponitreux.]
In hyponitrous acid, an unstable acid, (HNO)2, obtained in combination as a potassium salt.
| 1826 Henry Elem. Chem. I. 319 It appears to me that there are sufficient grounds for admitting the existence of hypo-nitrous acid as a distinct compound. 1838 T. Thomson Chem. Org. Bodies 101 Nitric and hyponitrous acid transform picrotoxin to oxalic acid. 1894 Roscoe & Schorlemmer Chem. I. 505 Free hyponitrous acid has not been prepared, as when liberated from its salts, it very rapidly splits up into its anhydride (nitrous oxide) and water. |