UK Workplace exposure limits(EH40/2005)-List of Approved Workplace Exposure Limits

Items: 428
Last update: Feb 2, 2026
Entry number
CAS number
English substance name
Long-term exposure limit(8-hr TWA reference period,ppm)
Long-term exposure limit(8-hr TWA reference period,mg.m3)
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UK Workplace exposure limits(EH40/2005)-List of Approved Workplace Exposure Limits
Introduction of GCIS
UK Workplace exposure limits(EH40/2005)-List of Approved Workplace Exposure Limits is published by the Health and Safety Executive (HSE) in the official document EH40/2005, serving as the core supporting document for the UK Control of Substances Hazardous to Health Regulations (COSHH) with clear legal effect. This list specifies workplace exposure limits (WEL), divided into 8-hour TWA and 15-minute STEL. Inhalable dust (such as RCS silica) and carcinogenic substances (such as chromates) require special control strategies.
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