化学实验室中的有毒药品,能使人体的组织、细胞发生破坏,导致病变甚至死亡。化学有毒药品根据其毒性的大小,一般分为四级。 1级:对人体有轻微危害,不危及生命。 2级:对人体有危害。高浓度气体或蒸气,可导致急性中毒死亡。如苯为2级危害品,高浓度蒸气可造成急性中毒而死亡。 Chemical laboratories of toxic drugs, can make the body’s tissues, cells destroyed, leading to disease or even death. Chemical toxic drugs according to the size of their toxicity, generally divided into four. Level 1: slight harm to the human body, do not endanger life. Level 2: Harmful to the human body. High concentration of gas or vapor, can cause acute poisoning death. Such as benzene for the second grade hazards, high concentrations of vapor can cause acute poisoning and death.