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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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