Na2S(%) 60.0Min
Na2CO3(%) 2.0Max
Water Insoluble(%) 0.2Max
Fe(%) 0.005Max/0.003Max

Property: white or light yellow crystalline powder or small crystal, with SO2 odor,Sg 1.4.
Use: Used in drug, food, ferment, rubber, textile, photo, flavor, dyes, tannage and preservativeof fruit and vegetable.
Packing: 25kgs plastic woven bags or 150kgs new iron drums.