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    1. Dimethyl sulfate

      Product   name

      Sequence   numbers

      Testing   programmes

      First grade
      products
      Qualified products

      Dimethyl sulfate

      (Q/WQH03-2013)

      1

      appearance

      colourless

       transparent liquid

      colourless 

      transparent liquid

      2

      content(%)

      98.6

      98.1

      3

      acidity(%)

      0.58

      0.75


      Liquid sulfur dioxide

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