... food grade purity of 97% Min use for Bleaching agent,loosening agent,corrosion protection antiseptic,anti sodium metabisulfite food ... 598.6qualified________content of Fe%≤0.0150.003qualified________content of water-insoluble≤0.100.04qualified________Main purposes: Bleaching agent( ... juice, can,etc ), antioxidant(for lily flower, sea food, fruit, vetegable,etc ) . Packing: external polypropylene woven ...