Zinc Thiocyanate, Zn(CNS)₂

A white efflorescence of the dihydrate Zn(CNS)₂.2H₂O has been obtained by treating zinc sulphate solution with an exact equivalent of barium thiocyanate and evaporating. It is soluble in water and in alcohol. The diammoniate, Zn(CNS)₂.2NH₄, is obtained by dissolving zinc oxide in ammonia and alkali thiocyanate solution. The salts K₂Zn(CNS)₄3H₂O, Cs₂Zn(CNS)₄2H₂O, Ag₂Zn(CNS)₄, CsAgZn(CNS)₄.H₂O, Cs₂AgZn(CNS)₅, CsAg₃Zn₂(CNS)₈, and CsAg₄Zn₂(CNS)₄ have been prepared.

The double thiocyanate of zinc and mercury, ZnHg(CNS)₄, has been used to estimate zinc.