In the “Journal für praktische Chemie,” [2] 6, 99, Pfankuch states that “when one adds chloroform to an alcoholic solution of sulphide of potassium a reaction takes place often with explosive violence, and by repeated extraction of the mass with absolute alcohol one obtains a compound which crystallises from alcohol in long prisms, and may be considered as a double salt of sulphide of potassium and sulphoform.”