© 2003 BMJ Publishing Group
EDUCATION
Hydrogen sulfide: UK occupational exposure limits
Correspondence to:
Correspondence to:
Dr MG Costigan, Health and Safety Executive, Room 211, Magdalen House, Trinity Road, Bootle, Merseyside L20 3QZ, UK;
michael.costigan@hse.gsi.gov.uk
Keywords: hydrogen sulfide; occupational exposure limits
| The first 150 words of the full text of this article appear below. |
Hydrogen sulfide (H2S) is a toxic gas with an offensive odour reminiscent of rotten eggs. There is the potential for widespread occupational exposure to H2S, including in the oil and water treatment industries. There is a particular concern for exposure in confined spaces such as manholes and sewer pipes; the high concentrations that can build up in such conditions (> 1000 parts per million (ppm)) can lead to the rapid development (within minutes) of unconsciousness and death. There are many reports throughout the literature of fatalities caused by exposure to H2S. However, there is also a concern for adverse health effects caused by day to day occupational exposures to low concentrations (< 10 ppm); this is because H2S selectively binds to the enzymes involved in cellular respiration thereby causing a shift towards anaerobic respiration. The recently revised UK occupational exposure limits for H2S are designed
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Occup. Environ. Med. 2003 60: 262-270.[Abstract] [Full Text] [PDF]
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