1.60% in purity 2.Appearance: yellow flakes 3.Packing:25kg PP woven lined with PE bag 4.Fe contect: 30ppm Sodium SulphideSpecification:Na2S(%) 60.0MinNa2CO3(%) 5.0MaxWater Insoluble(%) 0.8maxFe 1500ppm ,150ppm ,80ppm, 60ppm ,30ppm maxPacking: 25kg plastic weaving bag. Sodium Sulphide