Exposure Assessment of 3,3′-Dichlorobenzidine (DCB) at Two Chemical Plants

M. London, J. Boiano, Steven A. Lee
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引用次数: 6

Abstract

Abstract 3,3′-Dichlorobenzidine (DCB), an analogue of benzidine, has been an Occupational Safety and Health Administration (OSHA)-regulated carcinogen since 1974. This article presents a limited case study evaluating worker exposure to DCB at two pigment manufacturing plants. In each plant, exposure to DCB was estimated by personal breathing-zone (PBZ) and general area (GA) air samples, by skin patch and surface wipe samples, and by analysis of urine collected before and after the DCB-charging operation. Plant A performs the DCB-charging operation in a dedicated 12-ft × 10-ft enclosed room. Two workers perform the operation, each wearing full protective clothing and an air-supplied hood. After decontaminating the work area with a sodium hypochlorite bleach solution, the workers enter a “dirty” change room to undress, and then shower and change into clean work clothes in a “clean” change room. The levels of DCB found averaged 0.45 μg/m3, PBZ; 0.18 μg/m3, GA; and 0.04 μg/cm2, skin. Detectable levels of urin...
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3,3 ' -二氯联苯胺(DCB)在两个化工厂的暴露评估
3,3 ' -二氯联苯胺(DCB)是联苯胺的类似物,自1974年以来一直是职业安全与健康管理局(OSHA)监管的致癌物。这篇文章提出了一个有限的案例研究,评估工人在两个颜料制造厂暴露于DCB。在每个工厂,通过个人呼吸区(PBZ)和一般区域(GA)空气样本,皮肤贴片和表面擦拭样本以及DCB充电操作前后收集的尿液分析来估计DCB暴露。工厂A在一个专用的12英尺× 10英尺的封闭房间内进行dcb充电操作。两名工人进行操作,每人穿着全套防护服和通风罩。在用次氯酸钠漂白剂溶液对工作区域进行消毒后,工人们进入“脏”的更衣室脱掉衣服,然后在“干净”的更衣室淋浴并换上干净的工作服。二氯环己烷平均含量为0.45 μg/m3, PBZ;0.18 μg/m3, GA;皮肤0.04 μg/cm2。尿素的检测水平…
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