The difference between Sodium Cyanate (naocn), and Sodium Cyanide (nacn), is fundamentally based on One molecule of oxygen. This difference in atomic structure affects the molecular shape, electron configuration, and bioactivity of both anions.
- The cyanide Anion ([c≡n]-): the cyanide Anion contains a carbon atom bonded to a nitrogen atom by three covalent bonds. A high degree of localization of the formal negative charge on the nitrogen atom makes it a strong nucleophile and a strong ligand. Cyanide also has a very high affinity to bind metal cations, particularly iron in biological systems.
- The cyanate Anion ([o-c≡n]-): the cyanate Anion includes an oxygen atom located between the sodium ion and the nitric acid group. By adding oxygen to the system, the distribution of electrons is altered and the negative charge is distributed throughout the oxygen and nitrogen atoms. The bond between the carbon and the oxygen reduces the potential of the carbon-nitrogen bond to act as a target for biological molecules containing hydroxyl groups such as glucose.
Physical properties & chemical characteristics
Procurement specialists need to examine documentation for specific physical and chemical characteristics when evaluating technical data sheets or certificate of analysis (CoA) documents. Each compound is identified using the following information:
| Technical Parameter | Sodium Cyanate (NaOCN) | Sodium Cyanide (NaCN) |
|---|---|---|
| Chemical Formula | NaOCN | NaCN |
| CAS Registry Number | 917-61-3 | 143-33-9 |
| Molecular Weight | 65.01 g/mol | 49.01 g/mol |
| Physical Appearance | White crystalline powder or needles | White solid blocks, flakes, or granular powder |
| Odor Profile | Odorless | Faint, bitter almond-like odor (when damp) |
| Water Solubility | 10.68 g/100 mL (at 20°C) | 48 g/100 mL (at 10°C) — highly hygroscopic |
| Chemical Stability | Stable under dry conditions; hydrolyzes slowly in moisture. | Decomposes rapidly in contact with moisture/acids to release deadly HCN gas. |
Industrial uses: how are they used?
Useful industry application of Sodium Cyanate (naocn)
Sodium Cyanate has numerous uses in modern organic syntheses and metallurgically applied processes. Some of those are:
- Metal surface treatment & ferritic nitrocarburizing: Sodium Cyanate is utilized as a key ingredient in molten salt baths to produce surface layers that are case-hardened on steels. This provides enhanced properties including increased wear resistance, fatigue strength and corrosion protection with no associated acute HAZARD potential related to cyanide-based compounds.
- Agrochemical production: it is a precursor in the production of many broad-spectrum herbicides and other agrochemical products; and also serves as a precursor in producing symmetrical triazines.
- Pharmaceutical intermediate compounds: used in developing organic urea compounds for Pharmaceutical synthesis and development; used in developing drugs which treat sickle-cell disease; and use in development of various intermediates used in synthesis of unique drugs.
Industry use of Sodium Cyanide (nacn)
- In contrast to Sodium Cyanate’s versatility, Sodium Cyanide is primarily used in hydrometallurgy due to its ability to form soluble complexes with metal cations. The most common use of Sodium Cyanide is in extracting gold and silver from ores.
- Gold and silver leach process: Sodium Cyanide reacts with oxygen to create a soluble coordination complex with gold.
Toxicity & biological action: why does One oxygen save lives?
Safety critical distinction between Sodium Cyanide and Sodium Cyanate – Sodium Cyanide: as an extremely potent metabolic poison, Sodium Cyanide rapidly dissociates upon exposure to air to release free cyanide ions. These ions react rapidly with the iron(iii) ions (fe3+) present in cytochrome c-oxidase present in human mitochondria. This blocks cellular respiration, effectively “asphyxiating” the cell. Acute inhalation of Sodium Cyanide results in immediate respiratory failure followed by complete body shut down.
Is Sodium Cyanate toxic? Sodium Cyanate is very different from Sodium Cyanide. It does not degrade into free cyanide ions during ordinary biochemical and industrial usage. Therefore, Sodium Cyanate is generally considered a compound of low-to-moderate Toxicity. The primary toxic effect of Sodium Cyanate occurs when it undergoes carbamoylating reactions with proteins. Although it must be treated with caution using proper PPE to avoid localized irritation to skin and/or lungs, Sodium Cyanate does not pose a significant lethal threat of the severity and immediacy posed by Sodium Cyanide
Global Trade, Logistics, and Supply Chain of Cyanates/ Cyanides
The regulation of sodium cyanide has led to numerous international regulations, the International Cyanide Management Code, environmental documentation and increased homeland security oversight of all sources, shipment, importation, exportation and clearance. Therefore sourcing, importing/exporting and clearing sodium cyanide is very difficult to accomplish on behalf of companies with limited chemical experience.
As opposed to being an extremely hazardous substance when ingested, sodium cyanate is freely sourced through global supply chain systems. Companies in both the United States and Canada have been able to source this compound from verified Indian suppliers such as Sihauli Chemicals (a specialized chemical supplier), other Indian suppliers or the United States and Canada-based suppliers who provide sodium cyanate as part of their product offerings. These reliable sources for sodium cyanate allow companies to utilize it in their production processes while minimizing the risks associated with handling dangerous materials.
Most Frequent Queries
Is sodium cyanate identical to sodium cyanide?
No, Both sodium cyanate (NaOCN) and sodium cyanide (NaCN) contain nitrogen and carbon but they are chemically distinct. Sodium cyanide is a toxic metabolic poison that prevents the respiratory process at the cellular level. While still toxic, sodium cyanate has reduced toxicity as a result of the additional oxygen molecule present in its molecular structure. Additionally sodium cyanate is utilized in separate industrial processes than sodium cyanide.
What is the least toxic type of cyanide?
None, All forms of free cyanide are inherently toxic as a result of the presence of the carbon nitrogen bond. However, organically-bound cyanides referred to as nitriles are much less acutely hazardous since they do not release free cyanide ions in living organisms. Therefore, companies using cyanide-based surface hardening can safely use sodium cyanate as a substitute for cyanide salts.
What is sodium cyanate typically used for?
Sodium Cyanate is primarily utilized by the metal working industry for ferritic nitro-carburizing (case hardening) of steel. Additionally sodium cyanate serves as a key intermediate chemical in agriculture for formulation of herbicides, and as a starting point in pharmaceutical synthesis for creation of unique organic compounds.
