Na2S is the formula for sodium sulfide. Sodium sulfide is an ionic compound composed of two Na+ ions and one S2- ion.
Sodium sulfide is a crystalline substance that ranges from white to yellow to brick red in color and has the classic sulfur odor that resembles rotten eggs. As a hazardous substance, sodium sulfide has the following characteristics:
- It is extremely basic and reacts violently with acids to produce hydrogen sulfide gas, which is flammable and extremely toxic.
- In anhydrous form, it can become hot enough to set fire to flammable substances when exposed to moisture.
- It is highly caustic to both the skin and eyes.
- It causes lung damage if the powder or fumes are inhaled.
Uses of sodium sulfide include:
- Dye for textiles, paper and leather
- Extraction of ores
- Part of the Kraft process for digesting wood chips in the production of paper