Sodium Hydrosulphide Specs: Purity: 70%min Na2S: 2.5%max Fe: 0.02%max Usage: Manufacture of ammonium sulfide, ethyl sulphur alcohol. Raw material and semiproducts in thiourea production. As floatation agent in copper ore, depilatory in tanning and leather, desulphur agent in chemical fertilizer, as sulfide dye agent in synthetic fibre