SODIUM SULFIDE, Na2S Purity: 60%Min Red/Yellow Flake Fe:30ppm,60ppm,80ppm,150ppm,300ppm,1500ppm 25kg PP ... woven bag Professional manufactory of Sodium sulphide60% red and yellow flakes, withFe content of 30ppm, 60ppm, 80ppm, 150ppm, 300ppm ... Insoluble 0.05%MaxFe 0.003% Max Sodium Sulphide 60% yellow and red flakes