Natriumsulfiidi

Natriumsulfiidi is an inorganic compound with the chemical formula Na2S. It is the sodium salt of hydrogen sulfide. In its pure form, natriumsulfiidi is a colorless solid, but it is often encountered in commerce as a hydrated form, typically Na2S·9H2O, which is a yellow crystalline solid. This hydrated form is commonly referred to as sodium sulfide nonahydrate.

Natriumsulfiidi is highly soluble in water, forming alkaline solutions due to hydrolysis. It is also soluble in alcohol. It is a strong reducing agent. When exposed to air, it can oxidize to sodium thiosulfate or sodium sulfate. It is a flammable solid and can react with acids to release toxic hydrogen sulfide gas.

Industrially, natriumsulfiidi is produced by the reduction of sodium sulfate with carbon at high temperatures. It has various applications, including in the production of sulfur dyes, in leather tanning as a dehairing agent, and as a flotation agent in mining. It is also used in the pulp and paper industry and in chemical synthesis. Due to its alkaline nature and potential to release hydrogen sulfide, proper handling and safety precautions are necessary when working with natriumsulfiidi.