TIH 1
TIH 1 :
Toxic Inhalation Hazard. ".... a gas or volatile liquid which is known to be so toxic to humans as to pose a hazard to health during transportation, or in the absence of adequate data on human toxicity, is presumed to be toxic to humans because when tested on laboratory animals it has an LC50 value of not more than 5000 ppm". (DOT, Emergency Response Guidebook Hazardous Materials Incidents, 2004, pp. 4 and 364)
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