Synonyms:Sodium Rhodanide, Sodium Sulfocyanate, Sodium Rhodanate, Sodium Isocyanate, Thiocyanic Acid, Sodium Salt
Molecular Formula: NaSCN
Molecular Weight: 81.07
Description
Sodium thiocyanate is one of the main sources of the thiocyanate anion. It is commonly employed in the laboratory as a test for
the presence of Fe3+ ions. Sodium thiocyanate is employed to convert alkyl halides into the corresponding alkylthiocyanates.
Similar reagents include ammonium thiocyananate and potassium thiocyanate, which has twice the solubility in water. Silver
thiocyanate may be used as well; the precipitation of insoluble silver halides helps simplify workup. Treatment of isopropyl
bromide with sodium thiocyanate in a hot ethanolic solution yields isopropyl thiocyanate. Protonation of sodium thiocyanate
affords isothiocyanic acid, S=C=NH (pKa = -1.28). This species is generated in situ from sodium thiocyanate; it adds to organic
amines to afford derivatives of thiourea.
Specification
Index | Highest Grade | First Grade | Liquid |
NaSCN Min % | 99.0 | 98.0 | 50--53 |
PH value in water(50g/L) | 6.0--8.0 | 6.0--8.0 | 8.0--12.0 |
Clarity Test in water(100g/L) | Clarity | Clarity | Clarity |
Insoluble substance in water Max % | 0.005 | 0.005 | 0.003 |
Chlorid(Cl-) % Max | 0.02 | 0.04 | 0.01 |
Sulfate(SO42-) % Max | 0.02 | 0.04 | 0.01 |
Heavy metal(Pb) % Max | 0.002 | 0.005 | 0.001 |
Iron(FE) % Max | 0.0002 | 0.0002 | 0.0001 |
Water % Max | 1 | 1.8 | --- |
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