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        Sodium metabisulfite


        【Alias】: Sodium pyrosulfite; disodium disulphite; Sodium metabisulphite; Sodium disulphite; Sodium pyrosulphite; SODIUM DISULFITE; disodium oxidosulfanesulfonate oxide; Sodium Metabi; Metabisulfite Sodium
        【English name】: Sodium Pyrosulfite Sodium Metabisulfite
        【Molecular formula】: Na2S2O5
        【Molecular weight】: 190.10

        【Standard】GB1893-86

        item
        index
        Sodium metabisulfite %
        ≥65
        ferrum
        ≤0.005
        PH
        4—4.6
        heavy metal in Pb %
        ≤0.002
        aresenic(As)%
        ≤0.0002
        appearance white or light yellow crystal powder

        【Uses】:
        In medical industry, for manufacturing of chloroform, sulfetrone and benzaldehyde; in rubber industry as coagulator; in dyeing industry, as antichlor and scouring assistant; in leather industry, as treating and tanning agent; in chemical industry for manufacturing of hydroxycitronellal, hydroxylamine hydrochloride; as developing agent in photographic industry; as bleaching agent, preservative, anti-oxidant, and etc.

        【Physical and chemical properties】:
        White or light yellow crystal powder, relative density: 1.4; soluble in water, glycerol and ethyl alcohol

         
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