Ortho-phthalates versus terephthalates


  • Phthalate plasticizers like DOP and DINP are produced using phthalic anhydride (picture)
  • Phthalic anhydride is obtained by oxidation of ortho-xylene
  • In chemistry the term phthalates¬† is used to mean ortho-phthalates



  • DOTP and PET bottles are produced using purified terephthalic acid (picture)
  • Purified terephthalic acid is produced by oxidation of para-xylene
  • Terephthalates do have a very different chemical structure and are toxological completely different
  • Terephthalates are biological not active and have zero potential for reproductive effects (hence use in water bottles)

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