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    FEB 2021
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    International Journal of Toxicology (2021), Volume 40, (Issue 3)
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Deriving compound-specific exposure limits for chemicals used in pharmaceutical synthesis: Challenges in expert decision-making exemplified through a case study-based workshop

Drewe WC; Dobo KL; Sobol Z; Bercu JP; Parris P; Nicolette JJ;

A workshop entitled “Deriving Compound-Specific Exposure Limits for Chemicals Used in Pharmaceutical Synthesis” was held at the 2018 Genetic Toxicology Association annual meeting. The objectives of the workshop were to provide an educational forum and use case studies and live multiple-choice polling to establish the degree of similarity/diversity in approach/opinion of the industry experts and other delegates present for some of the more challenging decision points that need to be considered when developing a compound-specific exposure limit (ie, acceptable intake or permissible or permitted daily exposure).

Herein we summarise the relevant background and case study information for each decision point topic presented as well as highlight significant polling responses and discussion points. A common observation throughout was the requirement for expert judgment to be applied at each of the decision points presented which often results in different reasoning being applied by the risk assessor when deriving a compound-specific exposure limit. This supports the value of precompetitive cross-industry collaborations to develop compound-specific limits and harmonize the methodology applied, thus reducing the associated uncertainty inherent in the application of isolated expert judgment in this context. An overview of relevant precompetitive cross-industry collaborations working to achieve this goal is described.


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