HAZARD ALERT: Contact with acids or acid fumes may liberate flammable and poisonous hydrogen sulfide gas. Strong skin and mucous membrane irritant; toxic by skin absorption; vapor harmful. Even low concentrations may cause headache and general discomfort.
Storage: Inorganic #5; keep tightly closed; yellow color intensifies as substance ages.
Shelf Life: Good if stored safely; store in a Flinn Chem-Saf™ Bag and then inside a Flinn Saf-Stor™ Can.
Soluble: Water, alcohol, and alkalies.
Odor: Rotten eggs.
CAS No. 12135-76-1 as ammonium sulfide
Technical Note: The true sulfide form is only stable at a very low temperature, i.e., 0 ºC and in the absence of water. The light solution (so-called “yellow”) contains approximately 20% (NH4)2S or 8% sulfur and 8% ammonia and is the common commercial solution.
Flinn Catalog/Reference Manual Page 41
Ammonium Sulfide Solution, Light, 500 mL