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Blásýra

HCN

Blásýra (sjaldnar vetnissýaníð) er afar rokgjarnt efni með efnaformúluna HCN. Blásýra er litlaus, baneitruð og gufar upp við 26 °C eða rétt fyrir ofan herbergishita.

Um 300 ppm af HCN í andrúmslofti er nóg til að drepa mann á nokkrum mínútum. Það hefur verið notað sem eitur og er meðal annars virka efnið í Zyklon B.

Heitið „blásýra“ er líka notað fyrir önnur skyld efni sem innihalda sýaníð (C≡N) hóp, þá helst kalíumsýaníð (KCN) sem er alþekkt þar sem margir þekktir einstaklingar (þ.m.t. nasistaforingjar) hafa fyrirfarið sér með því efni.

  Þessi efnafræðigrein er stubbur. Þú getur hjálpað til með því að bæta við greinina.

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