sodium thiocyanate
Sodium thiocyanate is a white orthorhombic crystal or powder. The relative density is 1.735g/cm3. Melting point is 287℃. It is easy to deliquesce in the air and produces toxic gas when it meets acid. Soluble in water, ethanol, acetone and other solvents. The aqueous solution is neutral, and reacts with ferric salt to produce bloody ferric thiocyanate, but does not react with ferrous salt, and reacts with concentrated sulfuric acid to produce yellow sodium bisulfate, cobalt salt to produce dark blue cobalt thiocyanate, and silver salt or copper salt to produce white silver thiocyanate precipitate or black copper thiocyanate precipitate. CAS: 540-72-7 mbth: Sodium sulfocyanate
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sodium thiocyanate
Sodium thiocyanate is a white orthorhombic crystal or powder. The relative density is 1.735g/cm3. Melting point is 287℃. It is easy to deliquesce in the air and produces toxic gas when it meets acid. Soluble in water, ethanol, acetone and other solvents. The aqueous solution is neutral, and reacts with ferric salt to produce bloody ferric thiocyanate, but does not react with ferrous salt, and reacts with concentrated sulfuric acid to produce yellow sodium bisulfate, cobalt salt to produce dark blue cobalt thiocyanate, and silver salt or copper salt to produce white silver thiocyanate precipitate or black copper thiocyanate precipitate.
CAS: 540-72-7 mbth: Sodium sulfocyanate
Application of sodium thiocyanate
Used as chemical analysis reagent, solvent for spinning polyacrylonitrile fiber, developer for color film, defoliant for some plants, etc.
In organic synthesis, it is used to convert halogenated hydrocarbons into corresponding thiocyanates. For example, isopropyl bromide reacts with sodium thiocyanate in hot ethanol solution to obtain isopropyl thiocyanate. Similar reagents are ammonium thiocyanate and potassium thiocyanate
Sodium thiocyanate is converted into isothiocyanic acid (S=C=NH) when it meets acid. After in-situ formation, it can react with amines to generate corresponding thiourea derivatives.
Used as solvent for spinning polyacrylonitrile fiber, chemical analysis reagent, color film developer, defoliant for some plants, and herbicide for airport roads. It is also used in pharmacy, printing and dyeing, rubber treatment, black nickel plating and manufacturing artificial mustard oil.
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