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      Sulfuric acid

      Project Index Test result
      Premium First grade Qualified product
      H2SO% ≥ 98.0 98.0 98.0 98.3
      Ash % ≤ 0.02 0.03 0.1 0.01
      Fe % ≤ 0.005 0.010 - 0.001
      Pb % ≤ 0.005 0.02 - /
      Hg % ≤ 0.001 0.01 - /
      As % ≤ 0.0001 0.001 0.01 /
      Transparency/mm ≥ 80 50 - 160
      Chroma Not darker than standard chromaticity Not darker than standard chromaticity Not darker than standard chromaticity Not darker than standard chromaticity

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