ammonium nitrite

Ammonium nitrite solution is stable at higher pH and lower temperature.

Ammonium nitrite on heating yields nitrogen gas and water.

Ammonium nitrite, NHNO, is the ammonia salt of nitrous acid.

UN2557 71 Ammonium nitrites and mixtures of an inorganic nitrite with an ammonium salt are forbidden for transport.

The mole ratio of Ammonium Nitrite to Ammonia must be above 10% mole ratio.

Ammonium nitrite can be made from dinitrogen trioxide, NO, which is formally the anhydride of nitrous acid:

Ammonium nitrite may explode at a temperature of 60-70 C, and will decompose quicker when dissolved in a concentrated aqueous solution, than in the form of a dry crystal.

The main route is via the Raschig process: aqueous ammonium nitrite is reduced by HSO and SO at 0 C to yield a hydroxylamido-N,N-disulfonate anion: