is capable of causing a serious and irreversible but non-lethal effect on a human, such as a depressed level of consciousness, muscular weakness or paralysis, acute renal or hepatic failure, arrhythmia, hypotension, dyspnea, respiratory depression, pulmonary edema or optic neuritis; or(c) is identified in Part 1 as a Category 1 toxic product.???vapour????? vapeur ?????vapour??? means the gaseous f