化学灾害性事故是指导致一种或几种有害物质释放的意外事件或危险事件。化学灾害性事故能在短期或较长时间内损害人类健康及危害环境,包括可引起疾病、损伤、残废或死亡的有毒物质的泄漏、释放、火灾、爆炸等。随着国民经济的迅速发展和科学技术的进步,化学危险品的种类和数量 Chemical disaster is an accident or a hazardous event that results in the release of one or more hazardous substances. Chemical disaster can damage human health and harm the environment in short or long term, including the leakage, release, fire and explosion of toxic substances that can cause disease, injury, disability or death. With the rapid development of the national economy and the progress of science and technology, the types and quantities of dangerous chemicals