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四甲基醇乙二urea:MAK价值文档 - 从2023年开始的德语版本翻译
1Institute of Applied Biosciences. Department of Food Chemistry and Toxicology. Karlsruhe Institute of Technology (KIT) Adenauerring 20a, Building 50.41 76131 Karlsruhe Germany.
概括
德国MAK委员会为四甲基醇乙二尿酸制定了新的职业暴露限值,为0.5 mg/m3. 这个值解释了其刺激性质和潜在的甲释放,并将其分类为致癌性和致病性风险.
科学领域:
- 职业健康和毒理学 职业健康和毒理学
- 化学品风险评估 化学品风险评估
- 工业卫生 工业卫生
背景情况:
- 甲基醇乙二urea (TMA) 是一个化学化合物,由德国参议院委员会调查化学化合物在工作场所的健康危害 (MAK委员会) 评估.
- 由于TMA在水溶液中释放甲,由于其低蒸气压力,预计将以气溶的形式存在.
- 以往的评估和未公布的数据被用来推导出职业暴露限值.
研究的目的:
- 根据所有毒理终点,推导四甲基醇乙二urea的职业暴露极限值 (MAK值).
- 根据其潜在的致癌性,致变性和敏感性影响,对TMA进行分类.
- 在发育和生殖毒性方面分配适当的风险组.
主要方法:
- 在文献中搜索和审查未发表的研究报告,以确定相关的毒理学数据.
- 评价上呼吸道刺激作为获得MAK值的关键效应.
- 对具有关键上呼吸道影响的物质应用经验方法,自2014年以来已建立.
- 对致癌性,生殖细胞致病性和峰值限制进行基于类比的分类,参考甲的既定分类.
主要成果:
- 根据上呼吸道刺激,对四甲基醇乙二尿素的最大工作场所度 (MAK值) 设定为0.5 mg/m3.
- 由于具有类似于甲的刺激性质,被分配了具有2的外出因子的峰值限制类别I.
- 四甲基醇乙二urea被分配到怀孕风险组C,对发育和围产/父母毒性的NOAEL分别为450 mg/kg和1000 mg/kg体重.
- 由于缺乏具体数据,与甲相似,它被归类为致癌物类别4和生殖细胞致癌性类别5.
- 临床发现表明皮肤敏感化潜力,导致名称"Sh".
结论:
- 对四甲基醇乙基尿素的0.5 mg/m3的MAK值的推导旨在保护工人免受其刺激作用.
- 致癌性,致变性和敏感性的分类突出显示了潜在的长期健康风险,需要谨慎管理.
- 将其归类为妊娠风险组C表明,在相关暴露水平下,发育和生殖毒性风险较低,但需要进一步的致癌性和致变性数据才能进行最终分类.
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