natriumsulfiidin

Natriumsulfiidi is the sodium salt of hydrogen sulfide. Its chemical formula is Na₂S. It typically appears as colorless or white crystalline solids, but impurities can give it a yellow or orange hue. Natriumsulfiidi is highly soluble in water, forming alkaline solutions due to hydrolysis. It is also soluble in alcohol.

In its anhydrous form, natriumsulfiidi has a melting point of 1176 °C. It is hygroscopic, readily absorbing moisture from the air. The hydrated form, Na₂S·9H₂O, is more commonly encountered and melts at 48 °C.

Natriumsulfiidi is produced industrially by the reduction of sodium sulfate with carbon at high temperatures. It is also a byproduct of some industrial processes, such as the Kraft process for pulping wood.

This compound has various industrial applications. It is used in the production of sulfur dyes, in leather tanning as a dehairing agent, and as a flotation agent in mining for the separation of ores. It also finds use in water treatment for removing heavy metals and in the chemical industry as a reducing agent. Due to its strong alkaline nature and potential to release toxic hydrogen sulfide gas upon contact with acids, natriumsulfiidi should be handled with caution.