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Yigyooly Chemicals Co., Ltd.
  • Yigyooly Chemicals Co., Ltd.
    Products
    Anhydrous sodium sulfite
    Molecular formula
    Na2SO3
    Molecular weight
    126.04
    Uses
    Mainly used in printing and dyeing, medicine, paper, chemical fiber, photographic, food, etc.
    Features

    white crystalline powder, Specific gravity 2.633.

    Quality index

    Technical indexes

    High pure

    Industrial grade

    Photographic grade

    sodium sulfite

    Top grade

    First grade

    sodium sulfite

    Na2SO3 ≥ %

    98.0

    97.0

    96.0

    97.0

    Fe ≤ %

    0.003

    0.003

    0.005

    0.002

    Water-insoluble matter ≤ %

    0.01

    0.02

    0.03

    0.05

    Free alkali (Na2CO3 ) ≤ %

    0.001

    0.1

    0.4

    0.15

    Sodium sulfate (Na2SO3) ≤ %

    1.2

    2.5

    -

    -

    Sodium chloride (NaCl) ≤ %

    0.003

    0.1

    -

    -

    Heavy metals (as Pb) ≤ %

    0.001

    -

    -

    0.002

    Arsenic (As) ≤ %

    0.0001

    -

    -

    -

    Sodium thiosulfate ≤%

    0.001

    -

    -

    0.0015

    Appearance of Aq. solution

    Qualified

    -

    -

    Qualified

    Reaction of Silver nitrate ammonia solution

    Qualified

    -

    -

    Qualified