... pulp, bamboo and timber bleach of stapk; Treatment agent of waste water; Rubber solidifying agent, and so on. Sodium Metabisulphite food grade ... Bleach agent (e. G. Candies, cake, bamboo shoots, etc); Loose agent (e. G. Bread, cracker etc); ... the cereals food is defended storage etc); Inhibitor and freshen agent (e. G. Day lily, seafood, fruit and vegetable etc ...