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This study introduces a new method for aggregate chemical risk assessment in the EU, combining exposure from various sources. The approach ensures comprehensive evaluation and transparency for consumer safety.

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Area of Science:

  • Environmental Science
  • Toxicology
  • Risk Assessment

Background:

  • Current EU chemical exposure assessments are product-specific, lacking aggregation across sources.
  • Integrated approaches offer improved comprehensive risk evaluation and value chain transparency.

Purpose of the Study:

  • To develop and demonstrate aggregate consumer exposure and risk assessment methods.
  • To establish a uniform risk metric for comprehensive evaluation.

Main Methods:

  • Calculated exposure and risk per pathway using the risk characterization ratio (RCR).
  • Aggregated pathway-specific RCRs to determine overall risk.
  • Normalized key input values to body weight for population-specific differences.

Main Results:

  • Demonstrated practical applicability using the antioxidant ethylene bis[3,3-bis(3-tert-butyl-4-hydroxyphenyl)butyrate] (Hostanox® O 3).
  • Aggregate RCRs were below one for all population groups studied.
  • Infants and toddlers exhibited the highest aggregate RCRs due to higher consumption and skin surface area.

Conclusions:

  • The developed methodology provides a transparent and applicable approach for aggregate exposure and risk assessment.
  • This method can be utilized by industry stakeholders and authorities for various substances.
  • The study informs the development of aggregate exposure and risk methods within EU regulatory frameworks.