The compound of Ammonium Sulfide is yellow-orange in colour. At temperatures below -18 ºC, it is crystalline solid. Further, if we talk about how it smells, it has quite an unpleasant smell which is similar to that of rotten eggs and ammonia odor.

Further, the melting point of Ammonium Sulfide is 0 °C whereas the boiling point is 40 °C. In addition to this, the density of Ammonium Sulfide is 1 g mL-1. It is also soluble with two things which are water and ethanol. Similarly, the thing it is not soluble with is toluene, benzene, hexane, and ether. Most importantly, it is unstable at temperatures that go higher than 0 ºC.