Hydrogen sulfide is an inorganic compound with a molecular formula of H2S and a molecular weight of 34.076. Under standard conditions, it is a flammable acid gas. It is colorless and has the smell of rotten eggs at low concentrations. Toxic (LC50=444ppm<500ppm). Its aqueous solution is hydrogen sulfuric acid, which is weaker than carbonic acid, but stronger than boric acid. It is soluble in water, easily soluble in alcohols, petroleum solvents and crude oil.
Hydrogen sulfide is mainly used in the manufacture of synthetic phosphors, electroluminescence, photoconductors, and photoelectric exposure meters. Organic synthetic reducing agent. Used for metal refining, pesticides, medicine, catalyst regeneration. General reagents. Preparation of various sulfides. It is also used in the manufacture of inorganic sulfides and in chemical analysis such as the identification of metal ions.
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