Sodium cyanide CAS 143-33-9 is an inorganic compound in the cubic crystal system, with the chemical formula NaCN. It is a white crystalline powder that is prone to deliquescence and has a faint bitter almond odor. It is highly toxic, and can cause poisoning and death if exposed to skin wounds, inhaled, or swallowed in small amounts. Melting point 563.7 ℃, boiling point 1496 ℃. It is easily soluble in water and hydrolyzes to produce hydrogen cyanide. The aqueous solution is strongly alkaline, making it an important basic chemical raw material. It is used as a complexing agent and masking agent in basic chemical synthesis, electroplating, metallurgy, organic synthesis of pharmaceuticals, pesticides, and metal treatment.

Chinese name: Sodium cyanide

Foreign name: Sodium cyanide

Nickname: Shannai, Shannai Sodium

Chemical formula: NaCN

Molecular weight: 49.007

CAS login number: 143-33-9

EINECS login number: 205-599-4

Melting point: 563.7 ℃

Boiling point: 1496 ℃

Water solubility: easily soluble

Density: 1.595 g/cm ³

Appearance: White crystalline powder

Applications: pesticides, gold extraction, masking agents, complexing agents, chemical synthesis, electroplating, etc.

Application area

Sodium cyanide is an important basic chemical raw material used in basic chemical synthesis, electroplating, metallurgy, organic synthesis of pharmaceuticals, pesticides, and metal treatment. Complex agents, masking agents. Extraction and electroplating of precious metals such as gold and silver.

Used as a quenching agent for various steels in the mechanical industry.

As the main components of copper, silver, cadmium, and zinc plating in the electroplating industry. In the electroplating solution, the anodic polarization effect can be reduced, ensuring the normal dissolution of the anode, stabilizing the plating solution, and improving the cathodic polarization effect to obtain a uniform coating.

Used in the metallurgical industry to extract precious metals such as gold and silver.

In the chemical industry, it is used to manufacture various inorganic cyanide and hydrogen cyanide raw materials, as well as to manufacture copolymers of organic glass, various synthetic materials, nitrile rubber, and synthetic fibers.

In the dye industry, it is used to manufacture melamine chloride (an intermediate of reactive dyes and a raw material for the production of whitening agents).

Used in the pharmaceutical industry to manufacture methyl cyanoacetate and diethyl malonate. Used as a mordant in the textile industry, it is also used for liquid carburization and nitriding of steel.

The important inorganic cyanide produced directly from sodium cyanide mainly includes sodium xanthate, potassium xanthate, potassium cyanide, zinc cyanide, barium cyanide, cuprous cyanide, sodium thiocyanide, and potassium thiocyanide; Organic cyanide compounds include cyanoacetic acid, malonitrile, methionine, cyanobenzene, trimeric chloride, etc. The main products used for hydrogen cyanide reproduction using sodium cyanide include: methyl methacrylate, butyl methacrylate, methacrylic acid, azodiisobutyronitrile, azodiisobutyronitrile, hypoaminotriacetic acid, hydroxyacetonitrile, etc.

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