Aluminium thiocyanate, Al(CNS)₃

Aluminium thiocyanate, Al(CNS)₃, is a soluble salt, used in dyeing. When solutions of the requisite alkali thiocyanates are evaporated at the ordinary temperature, double salts of the type M₃Al(CNS)₆.4H₂O (where M is K, Na, or NH₄) are obtained as colourless, deliquescent crystals.