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      Sodium Sulfite


      【English name】: Sodium Sulfite
      【Molecular formula】: Na2SO3
      【Physical and chemical properties】: White crystal or powder, PH: 9-9.5; density: 2.633(15.4℃); refractive index: 1.565; molecular weight: 126.04

      【Executive standard】: HG/T2967-2010

      item index
      superior grade top grade qualified
      sodium sulfite (Na2SO3) %≥ 98 97 96
      ferrum(Fe) %≤ 0.003 0.003 0.005
      water insolubles%≤ 0.01 0.02 0.03
      free alkali(Na2SO3) %≤ 0.001 0.1 0.4
      sodium sulfate(Na2SO4) %≤ 1.2 2.5 2.5
      chloride(Nacl) %≤ 0.003 0.1 0.1

      Uses】:
      As deoxidizing agent and bleaching agent in dyeing industry; as developing agent in photographic industry; as reducing agent in organic industry; also applied in paper-making, electronic and water treatment industry

      【Packaging】: 25kg plastic woven bag

       
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