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Published on: June 9, 2017
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Proposal for a neurotoxic classification for chemicals at work.
Shiraz Dib1, Thi-Hai-Yen Nguyen2, Julie Bodin2
1Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Univ Rennes, Rennes, France.
Archives of Environmental & Occupational Health
|January 4, 2021
Summary
A new classification method for neurotoxicity reveals many workplace chemicals pose risks. This tool aids in identifying neurotoxic substances to improve occupational health assessments and risk management strategies.
Area of Science:
- Toxicology
- Occupational Health
- Chemical Safety
Background:
- No dedicated database for workplace neurotoxicity exists.
- Existing toxicological data is fragmented.
- Need for a standardized classification system for neurotoxic chemicals.
Purpose of the Study:
- Develop a weight-of-evidence classification method for chemical neurotoxicity.
- Adapt the International Agency for Research on Cancer (IARC) model for carcinogenicity.
- Assess neurotoxicity of chemicals commonly used in French workplaces.
Main Methods:
- Collected human and animal evidence from toxicological profiles and literature.
- Developed a six-tiered classification system (neurotoxic to potentially not neurotoxic).
- Applied the method to 26 workplace chemicals, mixtures, or product groups.
Main Results:
- 31% of tested substances were classified as neurotoxic.
- 31% were classified as probably neurotoxic.
- 11% were classified as possibly neurotoxic, and 27% were not classifiable due to insufficient data.
Conclusions:
- The developed method is operational for classifying chemical neurotoxicity.
- A significant proportion of workplace chemicals exhibit neurotoxic potential.
- Improved occupational exposure questionnaires targeting specific chemical properties are recommended for better risk assessment.
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