当苯环上的氢原子被氨基(NH2)或硝基(NO2)取代,就成为苯的氨基或硝基化合物,如苯胺和硝基苯 这类物质在常温下是固体或液体,挥发性低,易溶于脂肪。在生产中引起中毒的主要原因,是直接或间接污染皮肤,加热时,也可以蒸气形式经呼吸道吸入体内,有的毒物还以粉尘形态或粉尘和蒸气兼 When a hydrogen atom on a benzene ring is replaced by an amino group (NH2) or a nitro group (NO2), it becomes an amino group or a nitro compound of benzene, and substances such as aniline and nitrobenzene are solid or liquid at ordinary temperature and have low volatility , Soluble in fat. The main cause of poisoning in production is the direct or indirect contamination of the skin. When heated, it can also be inhaled into the body through the respiratory tract in the form of vapor. Some toxic substances are also in the form of dust or dust and steam.