Assertion: phosgene | /r/HasAspect | severe toxicity
Facets:
Source sentences:
text: Phosgene in the tail gas has severe toxicity, be one of principal pollutant of gas, and the carbon monoxide that is contained in this tail gas accounts for more than 96%, therefore, the direct emptying of phosgene synthesis unit tail gas not only causes the unnecessary waste of carbon monoxide, and causes serious contaminate environment.