The Sodium sulfide is a widely used industrial chemical, appearing as a yellow to red crystalline solid with high solubility in water. Its chemical formula is Na₂S, and it releases hydrogen sulfide gas when exposed to moisture or acids, giving it a distinct odor. The chemical is extensively used in leather processing for dehairing and preparing hides for tanning. In the pulp and paper industry, sodium sulfide is a crucial component of the Kraft process, helping to separate lignin from cellulose and facilitating paper production. It also finds applications in wastewater treatment, where it removes heavy metals by forming insoluble sulfide compounds. Furthermore, sodium sulfide is used in the synthesis of sulfur-based chemicals, dyes, and rubber chemicals. While it is highly effective in industrial processes, handling sodium sulfide requires caution because it is corrosive and toxic if inhaled or ingested. Safety protocols, proper storage, and protective equipment are essential for minimizing risks. Its versatility and importance in multiple industrial sectors make sodium sulfide a critical chemical in modern manufacturing processes.