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[Evaluation of occupational benzidine exposure of workers in automated benzidine plants]
Medycyna Pracy
|January 1, 1980
Summary
New automated benzidine production significantly reduced airborne concentrations and worker exposure compared to older methods. Despite improvements, maintaining strict hygiene and considering age limits for workers over 50 remains crucial.
Area of Science:
- Occupational Health
- Industrial Hygiene
- Toxicology
Context:
- Benzidine exposure assessment in Polish industrial settings.
- Comparison of old versus new automated benzidine production processes.
- Evaluation of worker exposure levels and absorption routes.
Purpose:
- To compare benzidine exposure levels between old and new production conditions.
- To quantify airborne benzidine concentrations and absorbed doses.
- To investigate skin absorption as a significant exposure route.
Summary:
- Airborne benzidine concentrations were 10-fold lower in the new automated process (0.0008 mg/m3 geometric mean).
- Annual absorbed benzidine dose decreased from 0.2 mg to 0.065 mg, a threefold reduction.
- Significant benzidine contamination on skin and surfaces indicates dermal absorption is a major pathway.
Impact:
- Highlights the effectiveness of automation in reducing inhalation exposure.
- Underscores the importance of continued stringent hygiene protocols and surface decontamination.
- Suggests re-evaluating employment age limits for workers handling benzidine, particularly those over 50.