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Benzene: standards, occurrence, and exposure.

B Holmberg, P Lundberg

    American Journal of Industrial Medicine
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Occupational exposure limits for benzene vary globally, with many countries setting limits at 10 ppm. Benzene is a natural component of crude oil and a significant component of gasoline, posing environmental risks.

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    Area of Science:

    • Occupational Health
    • Environmental Science
    • Toxicology

    Background:

    • Benzene is a naturally occurring constituent in crude mineral oil (approx. 0.1%) and a significant component of gasoline (up to 4-5% by volume in Sweden).
    • Environmental exposure to benzene can also originate from pyrolysis processes, including tobacco smoking and the combustion of materials like polyvinylchloride.

    Purpose of the Study:

    • To document and compare national occupational standard values for benzene exposure.
    • To provide an overview of benzene exposure levels in various occupations and environmental sources.

    Main Methods:

    • Compilation and comparison of established national occupational standard values for benzene.
    • Review of existing data on benzene content in industrial materials like crude oil and gasoline.

    Related Experiment Videos

  • Summary of measured benzene exposure levels (8-hour time-weighted average) for workers in specific industries, such as petroleum refineries.
  • Identification of environmental sources of benzene exposure.

    • Main Results:

    • National occupational standard values for benzene range from 5 ppm (Sweden) to 10 ppm in countries including Australia, Denmark, Finland, Japan, The Netherlands, and the United States.
    • The technical guideline value in Germany is 8 ppm.
    • Benzene exposure levels for Swedish petroleum refinery workers (8-hour TWA) range from 0.1 to 1 mg/m³.
    • Benzene is present in crude oil and gasoline, and environmental exposure can result from combustion processes.

    Conclusions:

    • Significant variations exist in international occupational exposure limits for benzene.
    • Occupational and environmental monitoring is crucial for understanding and mitigating benzene exposure risks.
    • Sources of benzene exposure are diverse, including industrial materials and combustion byproducts.