Hydrogen sulfide is widely used in various industrial applications. In the chemical industry, it serves as a precursor for the production of sulfur-containing compounds, such as sulfuric acid and thioorganic compounds. It is also employed in the synthesis of inorganic sulfides, which are used in pigments and lubricants. In the petroleum industry, hydrogen sulfide is utilized in the hydrodesulfurization process to remove sulfur from crude oil, reducing environmental pollution. Additionally, it plays a role in metallurgical processes, where it is used to separate and purify metal ores. In analytical chemistry, hydrogen sulfide is used as a reagent to detect and quantify metal ions through precipitation reactions. It is also employed in wastewater treatment to remove heavy metals by forming insoluble metal sulfides. Despite its toxicity, hydrogen sulfide is studied in medical research for its potential therapeutic effects, particularly in modulating cellular functions and protecting against oxidative stress. However, its use in this field is still experimental and requires careful handling.