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All methods that have been suggested for the preparation of thiocyanogen solutions involve the use of strictly anhydrous solvents, since the presence of moisture causes rapid hydrolysis and decomposition to take place. It is possible, however, to stabilize thiocyanogen in aqueous solution to a limited extent by the presence of large quantities of potassium thiocyanate.Thiocyanogen has been prepared by the action of iodine upon an ethereal suspension of silver thi0cyanate.l This reaction does not go to completion, since thiocyanogen is a halogenoid2 lying between bromine and iodine in order of chemical activity. It can be prepared by the oxidation of a solution of hydrogen thiocyanate in ether with manganese dioxide. The electrolysis of thiocyanates in alcoholic solution results in the discharge of the thiocyanate radical and the formation of thiocyanogen as an anodic p r~d u c t .~ The interaction of plumbic acetate and thiocyanic acid in ethereal solution presumably results in the formation of plumbic thiocyanate which immediately decomposes into thiocyanogen and plumbous thio~yanate.~The action of bromine upon various metallic thiocyanates gives thiocyanogen in better yield, but few solvents yield