Exposure limit: 200ppm TWA；; 3 10ppm？ STEL； It has a serious corrosive effect on the skin (American meeting of industrial hygiene experts). 200ppm

TWA260mg/m3 TWA； 6000 ppm？ IDLH(NIOSH).200ppm TWA260 mg/m3 TWA(OSHA).

Toxic substance data: 67-56- 1 (hazardous substance data).