... ,80ppm,150ppm 3.purity:52%,iron:20ppm,50ppm,150ppm Item:sodium sulfide Na2SAppearance: Thin flakes, yellow or red, soluble water, presenting ... :52%,iron:20ppm,50ppm,150ppmApplication:Used as making sulphur dyestuff intermediate reducer, mordant, flotation agent, depilatory for leather, digestion auxiliary in ...