Nitrosyl chloride

• Stickstoffoxichlorid
• Nitrosoniumchlorid

Reddish brown gas

Gaseous

2.98 kg · m 3 (0 ° C)

-61.5 ° C

-5.55 ° C

271 kPa ( 20 ° C)

In water rapid hydrolysis

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Nitrosyl chloride ( ClNO ) is the acid chloride of nitrous acid HNO2. It is a byproduct in the formation of aqua regia. The resulting chlorine radicals capable of the precious metals gold and platinum to oxidize to Tetrachloridogoldsäure or Hexachloridoplatinsäure.

Production

In aqua regia, a mixture of concentrated nitric acid and concentrated hydrochloric acid in a 1:3 ratio, built next active chlorine and nitrosyl chloride, these two species are responsible for the in comparison to the pure acids significantly increased aggressiveness of the freshly prepared mixture:

For purification in the laboratory using one hand, the reaction of fresh Nitrosylhydrogensulfat with anhydrous sodium chloride:

On the other hand, it is obtained by introduction of nitrogen dioxide in a column of moist potassium chloride:

Can also last for producing chlorine are saturated at -50 ° C with nitric oxide

Or sodium nitrite and hydrochloric acid are reacted.

Nitrosyl chloride is reacted in industry by oxidation of ammonia to nitrogen oxides and subsequent reaction with sulfuric acid to form nitrosyl sulfuric acid. This is converted to the actual nitrosyl chloride with hydrochloric acid.

Properties

Nitrosyl chloride is a light-sensitive orange-yellow gas or yellow liquid which reacts with water to form HCl, HNO 3, HNO 2 and NO. It is strongly oxidizing and corrosive and attacks in liquid form, the skin very strongly.