1)Best price with good qality 2)Prompt delivery 3)SGS ,BV accepted 4)ISO passed 5)Stable quality in purity, color, impurity 1500ppm sodium sulphide, Usage : as making sulphur dyestuff intermediate reducer, modant, depilotary for leather etc.Specification:30PPM SODIUM SULPHIDENa2S : 60.0%MinNa2CO3 : 2.0%MaxWater Insoluble : 0.05%MaxFe : 0.003% MaxISO certificate Sodium Sulphide 60% 30ppm