Sodium sulfide is the chemical compound with the formula Na2S, or more commonly its hydrate Na2S·9H2O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na2S and its hydrates emit hydrogen sulfide, which smells like rotten eggs. Some commercial samples are specified as Na2S·xH2O, where a weight percentage of Na2S is specified. Commonly available grades have around 60% Na2S by weight, which means that x is around 3. Such technical grades of sodium sulfide have a yellow appearance owing to the presence of polysulfides. These grades of sodium sulfide are marketed as 'sodium sulfide flakes'. Although the solid is yellow, solutions of it are colorless.
Sodium Sulphide (60-62%): Iron Free Chemical Formula Na2S
Packing : 25 kgs HDPE Laminated bags. With thick inner liner.
Physical Property : Yellow or Saffron flakes.
Chemical Property : % of material as Na2S & NaHS contain 58 to 62. Excess alkali nil, Reducing compound other than Na2S & NaHS not more than 1%. Iron & aluminum compound not more than 0.05%. Sodium Sulphate nil. Sodium Chloride nil. Water insoluble less than 0.2%.
Uses: Sulphur dyes, Paper pulp, Photographic reagent, & analytical reagent.
