... , Sodium Sulphide Yellow Flakes 60%min, Sodium Sulphide Solid in high quality at competitive price.Uses: Mainly used in drug, food, ferment ... in water, presenting strong alkaline solution, easily oxidized when exposed to air.Specification: Na2S (%): 60%MinFe: 1500PPM, 150PPM, 80PPM, 50PPM, 30PPM, ... 0MinNa2CO3(%)2.0MaxWater Insoluble(%)0.2MaxFe(%)0.001Max/0.0005Max High Quality Sodium Sulphide Flakes