Name: Sodium sulfide; Sulphur alkalies; Smelly alkali; Sodium sulfide; Sulphide of sodium; Nine hydration sodium sulfide; Smelly soda Nature: The laminated shape, brown red, easy to dissolve in the water, slightly soluble in mellow, does not dissolve in the ether, its peroxide solution assumes the alkalinity, easy to oxidize in the air, virulent. Pure sodium sulfide for colorless crystallization powder. The absorption of moisture is strong, easy to dissolve in the water. The peroxide solution assumes the alkalinity response. When touch skin and hair will create burns. Therefore sodium sulfide popular name sulphur alkalies. The sodium sulfide peroxide solution will oxidize the sodium hyposulfite, the sodium sulfite, the sodium sulfate and the sodium polysulfide slowly in the air. Because the sodium hyposulfite production speed is quick, therefore the oxidized primary product is the sodium hyposulfite. The sodium sulfide in the air the deliquescence, and the carbonation deteriorates, releases the hydrogen sulfide gas unceasingly. Because the industry sodium sulfide includes impurity its luster to assume the pink, brown red, the brown color. Proportion, melting point, boiling point, also because of impurity influence, but different. Solubility: Easy to dissolve in the water, does not dissolve in the ether, slightly soluble in ethyl alcohol; Density: Relative density (water =1) 1.86; Stability: Stable; Risk markings 20 (alkalinity corrosion