We are the leading exporter of sodium metabisulfite,and we have been in this field for many years.So we can supply you with higher quality and lower price. 1) Product name:sodium metabisulfite 2) Content:96% min 3) H.S. Code: 28321000 4) Molecular Formula: Na2S2O5 5) Use: Used in food, ferment, rubber, textile, photo, flavor, dyes, tanning and preservative of fruit and vegetable. 25kg pp bag 25mt/fcl.