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    1. <th id="uiz2l"><pre id="uiz2l"><rt id="uiz2l"></rt></pre></th>
           
        2,2'-h  
      2,2'-hCAS No.: 3736-77-4

      Description: A white or almost white crystalline powder

      Loss on drying: 0.5%

      Residue on ignition: 0.1%

      Assay (HPLC): 99.0%

       

           
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