large stock iran antioxidant ippd chemical auxiliary agents
large stock iran antioxidant ippd chemical auxiliary agents
large stock iran antioxidant ippd chemical auxiliary agents
large stock iran antioxidant ippd chemical auxiliary agents
large stock iran antioxidant ippd chemical auxiliary agents
  • 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.
  • Can antioxidant protection be used to detect PPDS and TPS?
  • An efficient and stable method for the detection of PPDs and their TPs was developed. Oxidative degradation is the main cause of low extraction efficiency of PPDs and some TPs. Combined strong antioxidant protection for stable extraction PPDs and their TPs was first proposed.
  • How many PPDS are produced in China in 2020?
  • In 2020, China produced 200,000 tons of 6PPD, representing nearly 54% of the total production of rubber antioxidants . PPDs are highly reactive towards oxygen and ozone, resulting in various transformation products (TPs) that pose a risk to the environment and organisms .