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.