Sodium Cyanide (Cymit)

Sodium cyanide (NaCN) is a poisonous compound with the chemical formula NaCN. It appears as a white, water-soluble solid. Let’s delve into some key details:

1. Toxicity and Affinity for Metals:
   • Sodium cyanide is highly toxic due to its strong affinity for metals. This property makes it particularly dangerous.
   • The main application of sodium cyanide is in gold mining, where it is used to extract gold from ores. Its reactivity toward metals plays a crucial role in this process.
2. Production and Structure:
   • Sodium cyanide is produced by reacting hydrogen cyanide (HCN) with sodium hydroxide (NaOH):

     HCN+NaOH→NaCN+H2​O

   • The structure of solid NaCN is related to that of sodium chloride (table salt). Both the anions and cations are six-coordinate.
   • When treated with acid, sodium cyanide forms the toxic gas hydrogen cyanide (HCN):

     NaCN+H+→HCN+Na+

   • Hydrolysis of sodium cyanide leads to the release of small amounts of hydrogen cyanide, which has a distinctive bitter almond smell (although not everyone can detect it due to a genetic trait).
3. Industrial and Test Reagent Uses:
   • Sodium cyanide is widely used as a test reagent to assess the proper functioning of chemoreceptors.
   • It also finds applications in various industrial processes.

Remember, handling sodium cyanide requires extreme caution due to its toxicity. Always follow safety protocols when dealing with hazardous substances.