Sodium disulfide is an inorganic compound with the chemical formula NaS2-3. It is a white or yellow crystalline solid, soluble in water and some organic solvents.
Sodium disulfide has strong sulfidation properties and can be reduced to corresponding sulfides by some metal oxides. It can also react with acids to form hydrogen sulfide gas. In addition, Sodium disulfide can also be oxidized to Sodium sulfate by oxidants.
One of the main uses of Sodium disulfide is as a vulcanizing agent, used in the process of sulfur dyes and vulcanized leather in the dye and leather industry. It can also be used as a metal surface treatment agent, batteries, lawn chemicals and feed additives.
The method of preparing Sodium disulfide is usually to react soda ash with sulfur under appropriate conditions. First, soda ash is reacted with sulfur at high temperature, and then Sodium disulfide is separated by cooling and filtration.
Safety precautions should be taken when using Sodium disulfide. It is a corrosive substance that may cause irritation and chemical burns on contact with the skin or eyes. Wear protective gloves and glasses when using, and ensure good indoor ventilation. Avoid contact with acidic substances or avoid mixing with oxidants to avoid dangerous reactions. Relevant safety procedures shall be followed during storage and handling.