The present study assessed the concentration of xylene and toluene in the working environment of paint manufacturers.It was found that the concentration of xylene and toluene was below the TLV. The TWA of airborne xylene levels was <100 ppm, and toluene was 20 ppm. The current study found that the urinary hippuric acid levels in the exposed group were higher than in the nonexposedgroup, but that was not the case for methyl hippuric acid.However, among paint workers in the current study, 6.78% of paint workers had hippuric acid >1.6 g/g creatinine,the ACGIH-recommended biological exposure index for hippuric acid in urine. In this present study, workers who hadurinary hippuric acid higher than the BEI were working in jobs with high exposure potential, such as grinding pigment,tank cleaner, paint sprayer, and filling paint into containers.
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