The Sodium sulfide (Na₂S) is an industrially significant inorganic chemical used in a wide range of applications. It is typically a yellow to red crystalline solid that dissolves readily in water, releasing hydrogen sulfide gas. Its main applications are in the leather industry, where it is used for dehairing animal hides, and in the pulp and paper industry as part of the Kraft process for lignin removal and paper production. Sodium sulfide also serves as a reagent in water treatment, removing heavy metals by forming insoluble sulfide compounds. Furthermore, it is a key intermediate in producing sulfur-based chemicals, dyes, and rubber processing chemicals. Due to its corrosive nature and potential toxicity, strict safety measures are required when handling sodium sulfide, including protective equipment and proper storage. With its broad industrial applications and effectiveness in chemical processes, sodium sulfide remains a vital component in manufacturing, environmental treatment, and chemical production industries.