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      sodium sulfite

      Product   name

      Sequence   numbers

      Testing   programmes

      Superior

      First grade

      sodium sulfite

      (HG/T2967-2010)

      1

      appearance

      white crystalline powder

      2

      Na2SO3(%)

      97

      93.0

      3

      Fe(%)

      0.003

      0.005

      4

      water-insoluble substance(%)

      0.02

      0.03

      5

      free alkali(%)

      0.10

      0.40

      6

      sulfates(%)

      2.5

      __

      7

      chloride(%)

      0.10

      __


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