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Sodium cyanide is a compound with the formula Na C N and the structure Na + − C≡N. It is a white, water-soluble solid. Cyanide has a high affinity for metals, which leads to the high toxicity of this salt. Its main application, in gold mining, also exploits its high reactivity toward metals. It is a moderately strong base.
Among the most toxic cyanides are hydrogen cyanide (HCN), sodium cyanide (NaCN), potassium cyanide (KCN), and calcium cyanide (Ca(CN) 2). The cyanide anion is an inhibitor of the enzyme cytochrome c oxidase (also known as aa 3), the fourth complex of the electron transport chain found in the inner membrane of the mitochondria of eukaryotic ...
NaC 3 H 6 NO 3: sodium hydromethylglycinate: 70161–44–3 NaC 4 H 7 O 4: sodium diacetate: 126–96–5 NaC 6 H 6 SO 3: sodium benzosulfonate: 515–42–4 NaC 7 H 5 O 2: sodium benzoate: 532–32–1 NaC 7 H 8 SO 3: sodium tosylate: 657–84–1 NaC 8 H 7 O 2: sodium phenylacetate: 114–70–5 NaC 8 H 9 SO 3: sodium xylenesulfonate: 1300 ...
In the laboratory, this compound may be prepared by treating sodium cyanide with acetone, followed by acidification: [3]. Considering the high toxicity of acetone cyanohydrin, a lab scale production has been developed using a microreactor-scale flow chemistry [4] to avoid needing to manufacture and store large quantities of the reagent.
Reaction of the sodium cyanoacetate with ethyl bromide in an aqueous–organic two-phase system in the presence of a phase transfer catalyst. [ 4 ] Oxidation of 3-ethoxypropionitrile, an ether , with oxygen under pressure in the presence of cobalt(II) acetate tetrahydrate as catalyst and N -hydroxyphthalimide as a radical generator.
Sodium cyanide drum at the abandoned Chemung Mine in Masonic, California. Despite being used in 90% of gold production: [19] gold cyanidation is controversial due to the toxic nature of cyanide. Although aqueous solutions of cyanide degrade rapidly in sunlight, the less-toxic products, such as cyanates and thiocyanates, may persist for some years.
It was used to produce sodium cyanide by fusing with sodium carbonate: CaCN 2 + Na 2 CO 3 + 2 C → 2 NaCN + CaO + 2 CO. Sodium cyanide is used in cyanide process in gold mining. It can also be used in the preparation of calcium cyanide and melamine.
Nitrilotriacetic acid is commercially available as the free acid and as the sodium salt. It is produced from ammonia , formaldehyde , and sodium cyanide or hydrogen cyanide . Worldwide capacity is estimated at 100 thousand tonnes per year. [ 6 ]