Preparation of ammonium sulfide
Hydrogen sulfide is passed through 3 parts of concentrated ammonium hydroxide solution until no further absorption takes place. Then 2 parts of concentrated ammonium hydroxide solution is added in order to neutralize NH4HS. The rule, however, is to add only two-thirds of the quantity of solution of ammonium hydroxide, as it is better the preparation should contain a little ammonium hydrosulfide than that free ammonia should be present. Ammonium sulfide should be well protected from air and moisture.
Laboratory manual of inorganic preparations, by H. T. Vulte, 41-42, 1895
ammonium sulfide, ammonium sulphide
Diammonium sulfide, ammonium sulfide, 40-50% solution in water, diazanium sulfide, 2H0Q32TDFZ, A1952_SIGMA, W205303_ALDRICH, 11230_RIEDEL, 515809_ALDRICH, A1952_SIAL, AC1L199F, 515809_SIAL, BP-20355