... : Mainly used in drug, food, ferment, rubber, textile, photo, flavor, dyes, tannage and preserve active of fruit and vegetable.Property: Solid ... -fused, brown red color flakes or light yellow crystalline small crystal flakes, with ... .0MaxWater Insoluble(%)0.2MaxFe(%)0.001Max/0.0005Max Sodium Sulphide Red Flakes