Haz-Map can be seen as a research project to explore what we know and don't know about the thousands of chemicals to which workers are exposed, with application to environmental toxicology as well. In adding chemicals to Haz-Map, the structures of new chemicals are compared to the structures of well-known chemicals already in the database. Most of the new chemicals added can be classified as members of a class. There are now 250 classes (Categories) of chemicals in Haz-Map under 12 Major Categories. It is basic logic that members of a class inherit the properties of that class.
In summary, Haz-Map is a research project to publish the established occupational health effects of hazardous chemicals and to study the structure-activity relationships of workplace chemicals. Such research can help to classify chemicals for the prevention of occupational and environmental diseases.