free sample iran chemical auxiliary agent ippd antioxidant
free sample iran chemical auxiliary agent ippd antioxidant
free sample iran chemical auxiliary agent ippd antioxidant
free sample iran chemical auxiliary agent ippd antioxidant
free sample iran chemical auxiliary agent ippd antioxidant
  • Do substituted para phenylenediamine (PPD) antioxidants affect the environment?
  • Substituted para -phenylenediamine (PPD) antioxidants have been extensively used to retard oxidative degradation of tire rubber and were found to pervade multiple environmental compartments. However, there is a paucity of research on the environmental occurrences of their transformation products.
  • Are PPD antioxidants toxic?
  • An increasing number of studies have focused on the toxicity of these PPD antioxidants. (8−10,15,33) According to the European Chemical Agency, several of them were labeled as very toxic to aquatic life with long-lasting effects and harmful if swallowed and may cause an allergic skin reaction.
  • What is the dominant species of PPD-Q in Taiyuan?
  • By contrast, CPPD-Q and IPPD-Q were the dominant species for PPD-Qs in Taiyuan, which accounted for about 20 and 39% of the total of PPD-Qs, respectively.

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