Mercuriselenocyanate salts also include K, Fe, Co, Ni, Cu, Zn, and Cd.

[3] Selenocyanate can be produced in the reaction of selenium, selenide, selenite or selenate with cyanide ions.

[5] Selenocyanate is component of pollution from oil refineries and mine drainage water.

Methods considered include precipitation by metal salts, or extraction by plants.

Indian mustard converts some selenocyanate to selenocystine and selenomethionine, and volatiles dimethylselenide and methylselenocyanate.