对香水原料八水四甲基-纳夫他林-乙醇进行慢性水生危害评估
Aurelia Lapczynski1, Scott E Belanger2, Kristin Connors3
1Research Institute for Fragrance Materials, Mahwah, New Jersey, USA.
Environmental toxicology and chemistry
|April 25, 2024
概括
一种常见的香料成分 - - 八水四甲基 - - 纳夫他林乙 (OTNE) - - 用一种物种敏感度分布 (SSD) 评估了水生风险. 该研究建立了一个强大的PNEC,确保了这种生产量高的化学品的环境安全.
科学领域:
- 环境毒理学环境毒理学
- 生态毒理学 生态毒理学
- 化学品风险评估 化学品风险评估
背景情况:
- 八基四甲基纳夫他林乙 (OTNE) 是消费品中生产量较大的香料成分.
- 评估OTNE的水生风险需要强大的环境度和影响数据.
- 香料材料研究所 (RIFM) 框架要求对OTNE的PNEC不确定性进行物种敏感度分布 (SSD) 方法.
研究的目的:
- 使用SSD方法,为OTNE开发更精细的预测无效度 (PNEC).
- 用新的慢性毒性数据评估SSD模型的强度和稳定性.
- 确保OTNE在下水道消费品中的环境安全.
主要方法:
- 对各种水生物种进行了八项新的慢性毒性研究,以补充现有数据.
- 总结了使用慢性10%效应度估计的毒性数据.
- 从11种物种的SSD毒性值中得出第5百分点的危险度 (HC5).
主要成果:
- 大的敏感度最高 (0.032 mg/L),而小的敏感度最低 (>2.6 mg/L).
- 确定HC5为0.0498 mg/L,其95%的置信区间为0.0097-0.1159 mg/L.
- SSD模拟证实了模型的稳定性,发现明显更敏感的物种的概率很低.
结论:
- 强大的SSD为OTNE的环境风险评估提供了高的统计可靠性.
- 推的PNEC值为0.0249 mg/L (HC5的应用系数为2),可以确保环境保护.
- 风险评估适用于概率性环境风险评估,当与暴露数据相结合时.
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