HSE updates EH40/2005 Workplace Exposure Limits guidance

The Health and Safety Executive (HSE) have updated EH40/2005 Workplace Exposure Limits. The latest version includes 31 new and revised Workplace Exposure Limits (WELs) introduced by the 4th Indicative Occupation Exposure Limit Values Directive.

EH40 is the official reference document on WELs to be used alongside The Control of Substances Hazardous to Health (COSHH) Regulations 2002, as amended. The document guides those responsible for controlling exposure to hazardous substances at work.

Directive 2017/164 was implemented in Great Britain and Northern Ireland on 21st August 2018. There were new entries added for the following substances:

  • 2-ethylhexan-1-ol
  • Acetic acid
  • Acrylic acid
  • Amitrole
  • But-2-yne-1,4-diol
  • Diacetyl
  • Glycerol trinitrate
  • Methyl formate
  • Nitroethane
  • Nitrogen dioxide
  • Nitrogen monoxide
  • Sulphur dioxide
  • Hydrogenated terphenyl


Link to guidance.


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