Hexasulphamide, S₆NH₂

In the preparation of nitrogen sulphide, N₄S₄, from ammonia and sulphur monochloride, as already described, the mother-liquor may, on concentration, yield hexasulphamide in addition to nitrogen pentasulphide. Hexasulphamide, S₆NH₂, crystallises in colourless, square plates, melting at 105° C. It is insoluble in water but soluble in most organic solvents. It gives a coloration with alcoholic potash and with alcoholic solutions of organic bases.