1.High quality based on reasonable price 2.Large annual capacity 3.Eifficient ... in high quality at competitive price.Uses: Mainly used in drug, food, ferment, rubber, textile, photo, flavor, dyes, tannage and preserve active of ... .0MinNa2CO3(%)2.0MaxWater Insoluble(%)0.2MaxFe(%)0.001Max/0.0005Max High Quality Sodium Sulphide Flakes