... 10ppm, 20ppm,30ppm,80ppm,150ppm,1500ppm 4.100% gurantee sodium sulfideyellow or red flakes 10ppm,20ppm,30ppm,80ppm,150ppm, ... NO.:1849Property:Thin flakes,yellow or red,soluble in water,presenting strong alkaline solution,easily oxidized when exposed to ... 900kg jumbo bagsUsage:used as making sulphur dyestuff intermediate reducer,mordant,flotation agent,depilatory for leather,digestion auxiliary in ...