Hygienic risk base on a chemical product is defined by many factors: it´s chemical nature, the way it enters in to the body, exposure time, work conditions and susceptibility (Universidad Autónoma de Madrid). The chemical risk management audit allows recognition of principles of application of Globally Harmonized System (GHS), and identify methodologies of chemical risk, the evaluation of control for exposure to this risk, the relevance of prevention and treatment of occupational diseases. This results are the perfect basis for make the strategies to respond when we have an emergency.