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The Journal of the Royal Society for the Promotion of Health
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Biomedical Surveillance of Workers Exposed to 4,4'-Methylene-bis-(2-Chloroaniline) (MBOCA) in Perth, Western Australia

K.C. Wan

Occupational Medicine Branch, Department of Occupational Health, Safety and Welfare, Western Australia (DOSHWA)

B.R. Dare

Occupational Medicine Branch, Department of Occupational Health, Safety and Welfare, Western Australia (DOSHWA)

N.R. Street

Occupational Medicine Branch, Department of Occupational Health, Safety and Welfare, Western Australia (DOSHWA)

FROM 1984, a biomedical surveillance programme assessed the occupational exposure to 4, 4' methylene-bis-(2-chloroaniline) (MBOCA) in seven factories which manufactured polyurethane poly mers. Urinary MBOCA concentrations were used to assess absorption of MBOCA which is a scheduled carcinogen under the Poisons Act in Western Aus tralia.

The relevance and limitations of urinary MBOCA as a biological indicator of exposure to MBOCA, the use of spot urines based on creatinine concentrations in preference to 24 hour urine MBOCA estimations and urinary cytology are discussed.

Preventive measures to reduce exposures to as low as reasonably achievable (ALARA principle) were imple mented after a seminar held in April 1987 which was attended by representatives of the seven factories concerned.

Statistically significant falls in mean 24-hour urinary MBOCA levels were observed in follow-up levels in the five factories for which 'post-seminar' levels were measured.

The Journal of the Royal Society for the Promotion of Health, Vol. 109, No. 5, 159-165 (1989)
DOI: 10.1177/146642408910900503
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