Pharmaceutical ERA•Regulatory Toxicology•PDE / OEL
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Occupational Exposure Limits

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Permethrin Occupational Exposure Limit (OEL)

Project-specific occupational exposure limit (OEL) and exposure-banding (OEB/OHC) support for workplace risk management.

CAS Registry Number
52645-53-1
Molecular formula
C21H20Cl2O3
Molecular weight
391.29 g/mol

Chemical identifiers are reproduced from the ToxWriter API catalogue for reference. Confirm the substance identity and relevant form, including any salt, hydrate or isomer, against authoritative source documentation when defining the assessment scope.

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OELOEB / OHC where relevantIndustrial hygiene context
About this profile

Scope of the Permethrin occupational assessment

This ToxWriter profile covers the scope for a project-specific Permethrin OEL report (Occupational Exposure Limit). The final assessment scope depends on the substance form, relevant toxicological evidence, intended workplace context and applicable exposure-limit framework.

Typical scientific scope

  • Occupational hazard characterisation and identification of critical health effects.
  • Point-of-departure selection and assessment of relevant uncertainty factors.
  • Exposure duration, route and workplace-use considerations.
  • OEL derivation and/or OEB/OHC banding support, where appropriate.
Scope noteThis page outlines ToxWriter’s occupational toxicology assessment support for Permethrin. A numeric OEL or exposure band is assigned only within an appropriately scoped assessment; none is stated by this profile page.
Workplace context

OEL values sit inside a control programme.

Final application should be considered alongside containment, engineering controls, safe work practices, exposure monitoring and other occupational hygiene measures.

A numeric OEL is different from a PDE/ADE and from an exposure band.

OEL / OEB framework
OEL / OEB background →ECHA occupational exposure limits (OELs)NIOSH occupational exposure bandingOSHA Occupational Chemical DatabaseOSHA annotated permissible exposure limits (PELs)HSE EH40 workplace exposure limits

Workplace exposure limits and exposure-banding frameworks differ by jurisdiction and substance. An occupational exposure band (OEB) is not the same as a substance-specific numerical OEL.

ERAPDE / ADEOEL / OEB
Further reading

Published article on occupational exposure limits

This published article by Varun Ahuja and Mohan Krishnappa discusses approaches used to establish occupational exposure limits in the pharmaceutical industry. It is background reading, not a substitute for applicable workplace requirements or a substance-specific assessment.