... use for Bleaching agent,loosening agent,corrosion protection antiseptic,anti sodium metabisulfite food gradeinspection itemstandardinspection resultconclusion of each itemuncertaintyappearanceindustrial sodium metabisulfite is ... (for bread, biscuit, etc ), corrosion protection antiseptic(fruit juice, can,etc ), antioxidant(for lily flower, sea food, fruit, vetegable,etc ) . Packing: external ...