... , monthly exports1000mt. Sodium Sulfide Flake 60%minYellow Flake, iron content, 10 PPM,30PPM, 80PPM 1)Specifications 50ppm80ppm150ppm1500ppmNa2S60min60min60min60minNa2SO32.00max2.00max2.00max2.00maxNa2S2O32 ... manufactuers,has exported it to many countries. sodium sulfide flakes, Fe 10-80PPM