最高容许浓度（MAC）（特殊情况） 100 mg/m³（约87 PPM） 定义：任何情况下（如突发泄漏）均不得超过的瞬时浓度。 PC-TWA（20 mg/m³）： 长期暴露在此浓度下，健康劳动者一般不会出现明显症状，但敏感人群可能产生轻微头痛或疲劳。 PC-STEL（30 mg/m³）： 短期暴露 ...

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