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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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