|Silver fulminate hexamer
__ Ag __ C __ N __ O
|External identifiers / databases|
|Molar mass||149.89 g mol −1|
very bad in water (0.18 g l −1 at 90 ° C)
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
Silver fulminate was discovered in 1802 by the Italian physician and chemist Luigi Valentino Brugnatelli and before that by Edward Charles Howard , the inventor of fumed mercury . It should not be confused with the mercury fulminate, which in the firing cap of percussion weapons was used. Justus Liebig and Friedrich Wöhler discovered isomerism in silver fulminate and the isomeric silver cyanate in the 1820s .
Extraction and presentation
The technical production takes place through the action of alcohol on a nitric acid solution of elemental silver . The production is subject to strict safety regulations and may only be carried out by trained specialists. It is also possible to display it by reacting a nitric acid solution of silver nitrate with sodium nitrite and malonic acid .
Pure silver fulminate forms shiny, white needles. A gray color indicates contamination by elemental silver . It is only sparingly soluble in cold water.
Like all fulminates, silver fulminate is very toxic. Even in small quantities, it can explode even more easily than mercury fulminate under friction or impact . Between hard objects (metal spatulas) it explodes at the slightest impact, even under water.
Due to the explosive effect of silver fulminate, extreme caution is required when handling. In contrast to fiery mercury, it detonates even in the smallest quantities and is dangerous even when it is wet.
- Britton, D .: A Redetermination of the Trigonal Silver Fulminate Structure . In: Acta Crystallographica C . 47, No. 12, 1991, pp. 2646-2647. doi : 10.1107 / S0108270191008855 .
- Entry on silver fulminate. In: Römpp Online . Georg Thieme Verlag, accessed on December 28, 2014.
- This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- Ugo Baldini, Luigi Valentino Brugnatelli, in Dizionario Biografico degli Italiani 1972