노출 1~2시간 후 두통과 메스꺼움. 노출 1시간 후 두통, 메스꺼움, 현기증, 몇 분 후 쓰러지고 의식을 잃음. , ppm 노출 1시간 후 의식 상실.

ppm Headache and nausea after one to two hours of exposure. ppm Headache, nausea, and dizziness after minutes collapse and unconsciousness after one hour of exposure. , ppm Loss of consciousness after one hour of exposure.