| 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. |