Nitramide, NH 2 NO 2, is obtained by the action of sulphuric and nitric acids on potassium imidosulphonate, or by the action of ice-cold sulphuric acid on potassium nitro-carbamate (J.
Hantzsch (Ann., 1896, 2 9 2, pp. 34 0 et seq.) hyponitrous acid and nitramide are to be regarded as stereoisomers, being the anti-and synforms of the same compound.
Thiele, however, regards nitramide as imidonitric acid, HN :NO(OH).
Diazomethane converts it into the methyl derivatives of isocyanic acid, and nitramide, NH2N02.