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    Sodium hydrosulfite

    Molecular formula: Na2S2O4
    Executive standard:
    Industrial grade: HG/T 2074-2011
    Food grade: GB 22215-2008   HG/T 2074-2011
    Packing:
    1)iron drum in seal with inner double layer plastic film and net weight is 20kg,40kg
    2)domestic recoverable package and net weight is 1200kg;
    Notes: it should be stored in cool, dry and ventilated warehouse; please keep away from fire, heat and direct sunlight.
    Uses: textile reducing agent, printing assistant, decolorizer andcleaning agent; mechanical pulp in paper making industry; food food preservative and so on

    HG/T 2074-2011 product technical index:

    Item

    index

    superior grade

    top grade

    qualified product

    sodium hydrosulfite(Na2S2O4 ),%  ≥

    90.0

    88.0

    85.0

    Appearance

    white crystal powder

    smell

    no smell or light sulfur dioxide smell

    solubility

    soluble in neutral formaldehyde solution

    GB 22215-2008 product technical index :

    Item

    index

    sodium hydrosulfite(Na2S2O4 ),% ≥

    88.0

    charity

    pass testing

    heavy metal(Pb) ,%  ≤

    0.0010

    lead(Pb) ,%,≤

    0.0005

    cadmium(Cd),%,≤

    0.0002

    arsenic(As) ,%,≤

    0.0001

    Ethylene Diamine Tetraacetic Acid(EDTA)

    qualified

    formate(HCOONa),    %  ≤

    0.050


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