The Sodium sulfide is an inorganic compound with the chemical formula Na₂S, widely used in various industrial applications. It is a yellow to red crystalline solid with high solubility in water and a characteristic odor of hydrogen sulfide. The leather industry relies on sodium sulfide for dehairing animal hides during leather processing, while the pulp and paper industry uses it in the Kraft process to break down lignin and produce paper efficiently. Sodium sulfide also plays an important role in water treatment, precipitating heavy metals as insoluble sulfides to purify wastewater. Moreover, it is a key raw material in the production of sulfur-based chemicals, dyes, and rubber chemicals. Handling sodium sulfide requires care due to its corrosive nature and the risk of releasing toxic gases when exposed to acids or moisture. Proper safety measures, including protective equipment and adequate ventilation, are essential. Its versatility, efficiency, and critical role in multiple industrial processes make sodium sulfide an essential chemical for modern manufacturing.