The purpose of hazard identification is to evaluate the weight of evidence for adverse effects in humans based on assessment of all available data on toxicity and mode of action. It is designed to address primarily two questions: (a) whether an agent may pose a health hazard to humans, and (b) under what circumstances an identified hazard may be expressed. Hazard identification is based on analyses of a variety of data that may range from observations in humans to analysis of structure-activity relationships. 

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危险源辨识的目的是评估证据的权重基础上，对毒性和行动模式下，所有可用的数据评估，对人类的不利影响。它的目的是解决主要是两个问题：是否代理人可能造成健康危害人类，和在什么情况下鉴定的危害可以表达。危险识别是基于各种数据，这些数据可以为在人体的结构 - 活性关系分析观测分析。