Chemical elements
    Nitrogen Cycle
    Physical Properties
    Chemical Properties
      Nitrogen Chloride
      Nitrogen Iodide
      Nitrosyl Fluoride
      Nitrosyl Chloride
      Nitrosyl Bromide
      Nitryl Fluoride
      Nitryl Chloride
      Hyponitrous acid
      Nitrous Oxide
      Nitric Oxide
      Nitrogen Trioxide
      Nitrogen Tetroxide
      Nitrogen Pentoxide
      Nitroso-nitrogen Trioxide
      Nitrous Acid
      Pernitric Acid
      Sulphur Nitride
      Pentasulphur Dinitride
    Nitric Acid

Nitrohydroxylamine, HO-NH-NO2

Nitrohydroxylamine, HO-NH-NO2, or , is obtained in the form of salts by the action of ethyl nitrate on alcoholic hydroxylamine. When the salts, e.g. Na2N2O3, are acidified, the free acid instantly decomposes into nitric oxide and water, or nitrous and hyponitrous acids:

H2N2O3 = 2NO + H2O;
2H2N2O3 = 2HNO2 + H2N2O2.

The sodium salt, made by the above reaction in methyl alcohol, is a white powder, soluble and deliquescent. It absorbs oxygen from the air, giving NaNO2 and NaNO3. The aqueous solution when boiled decomposes into nitrite and nitrous oxide:

2Na2N2O3 + H2O = 2NaNO2 + N2O + 2NaOH.

The salts of the calcium group, e.g. CaN2O3.3½H2O, are sparingly soluble. The silver salt is almost insoluble. Salts of cadmium and mercury have also been prepared.

A great number of organic derivatives of the above are known under the name of diazo-compounds, as well as derivatives of compounds which have not yet been prepared in the free state, such as R.N2O2.H, derived from nitrosohydroxylamine, HO-NH-NO, which is isomeric with nitramide.

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