intro:
Product Name    Sodium sulfide
CAS RN            1313-82-2
EINECS RN       215-211-5
Molecular Formula Na₂S
Molecular Weight 78.03
Properties Density: 1.86
m.p.: 950°C
Solubility in water: 186 g/L (20°C)
Light yellow flake. 
Use In the manufacture of dyes, sulphides, as floating chemicals, depilating agent etc.