Potassium hyponitrite

HJ and starch action. As HJ and starch are poured into a potassium hyponitrite solution, the latter is colored blue 2-3 min afterwards, which is a result [171, 172] of insignificant amounts (traces) of N02 anion presence, which were formed in the following reaction [171-174] ... 

Potassium hyponitrite, K2N202.—The hyponitrite can be prepared from potassium nitrite by reduction with potassium-amalgam, or electro-lytically.6 Its heat of formation in aqueous solution is 116-2 Cal.7... 

Many of the following powdered metals reacted violently or explosively with fused ammonium nitrate below 200°C aluminium, antimony, bismuth, cadmium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, tin, zinc also brass and stainless steel. Mixtures with aluminium powder are used as the commercial explosive Ammonal. Sodium reacts to form the yellow explosive compound sodium hyponitrite, and presence of potassium sensitises the nitrate to shock [1], Shock-sensitivity of mixtures of ammonium nitrate and powdered metals decreases in the order titanium, tin, aluminium, magnesium, zinc, lead, iron, antimony, copper [2], Contact between molten aluminium and the salt is violently explosive, apparently there is a considerable risk of this happening in scrap remelting [3],... 

Lithium carbonate, 0533 Lithium dithionite, 4687 Magnesium carbonate hydroxide, 0534 Magnesium nitrate, 4693 Magnesium nitrite, 4692 Magnesium sulfate, 4696 Potassium carbonate, 0531 Potassium nitrite, 4649 Silver hyponitrite, 0031 Sodium acetate, 0779 Sodium carbonate, 0552 Sodium disulfite, 4808 Sodium dithionite, 4807 Sodium hydrogen carbonate, 0390 Sodium hydrogen sulfate, 4446 Sodium metasilicate, 4805 Sodium nitrite, 4720 Sodium sulfate, 4806 Sodium tetraborate, 0185 Sodium thiosulfate, 4804... 

In 1800, H. Davy prepared what he believed to be the potassium salt of nitrous oxide by exposing a mixture of potassium sulphide and hydroxide to nitrous oxide. The sulphide was converted into sulphate, and by solution and crystallization at a low temp., he obtained the compound mingled with very little potassium oarbonate and still less sulphide. The produot evolved nitrous oxide when heated, or when treated with oarbon dioxide, of sulphuric, hydrochlorio, or nitric acid. H. Hess also obtained what may have been silver hyponitrite, by heating barium nitrate, and treating the product with eilver salt, and decomposing some of the crystals thus obtained by water. 

A. E. Menke prepared bismuth hyponitrite as a white precipitate by adding sodium hyponitrite to a soln. of a bismuth salt. It is insoluble in acetic acid. The analogous precipitates of white manganese hyponitrite, red cobalt hyponitrite, and of green nickel hyponitrite are soluble in acetic acid. With ferrous salts, olive-green ferrous hyponitrite is formed, it is insoluble in water, and becomes yellow when treated with acetic acid. With ferric salts, yellow ferric hyponitrite is formed—insoluble in water, soluble in acetic acid. With potassium salts, platinum hyponitrite is formed which is less soluble in acetic acid than it is in water. 

Hyponitrites are produced by the action of sodium amalgam, that is, a solution of sodium in mercury containing about 4 per cent, of the former, on a solution of potassium or sodium nitrite. After the mixture has stood for some days, it is rendered slightly acid with acetic acid, and silver nitrate is added. A yellow precipitate of silver hyponitrite is produced other hyponitrites may be prepared from it by the addition of the calculated quantity of the respective chloride. The acid can also be liberated by the addition to a very dilute aqueous solution of the equivalent amount of hydrochloric acid. On warming the solution of the acid, nitrous oxide is evolved but nitrous oxide does not unite with water to form the acid. 

A new organonitrogen insecticide, hf-(2,4-dimethyl-phenyl) ff -methyl-formamidine, was determined on silica gel G plates developed with benzene-cyclohexane-methanol (1 1 1) mobile phase. The compound was detected with bismuth hyponitrite and potassium iodide reagents (73a) (Table 4). 

---