The chemical fact sheets contained in this notebook provide a hazard summary for each of the hazardous air pollutants specified in the Clean Air Act Amendments of 1990. These chemicals include volatile organic chemicals, chemicals used as pesticides and herbicides, inorganic chemicals, and radionuclides. These brief summaries are intended to provide a quick reference for pertinent toxicity information and to indicate where more comprehensive and primary information can be found. This information is targeted to those concerned with toxic air pollutants at the State and local levels. The fact sheets should be used as one of many information sources for understanding a pollutant's human health hazard potential. In the case of listed compound categories, one or more representative compounds have been selected for the fact sheet summary. When available, numerical data are presented in the fact sheets. The fact sheets are organized as follows: Chemical name and CAS number; Hazard summary; Environmental/occupational exposure; Assessing personal exposure; Health hazard information; Physical properties; and Uses. The hazard summary is an overview of the key information provided in the Health Hazard Information section of the fact sheet. The Environmental/Occupational Exposure section contains information on how the general public may be exposed to the chemical, e.g., through water, food, or air, as well as information on occupational exposure. The Health Hazard Information section summarizes the key toxicology information on the chemical, emphasizing the inhalation (air) route of exposure. If available, oral and dermal (skin) exposure data are also presented. The fact sheets do not represent EPA policy on health hazards and they should not be construed as constituting an EPA judgment about a hazard where a judgment does not already exist. In addition, they cannot be cited or quoted as a primary source of EPA health hazard information. Appendices contain a glossary of
health, exposure, and risk assessment terms; the definitions of acronyms used in the graphs that accompany the fact sheets; discussion of related terms frequently encountered in health, exposure, and risk assessments; and a hazardous air pollutants' Fact Sheet chemical cross reference, which contains an alphabetical listing of all the chemicals and their most common synonyms contained in this Notebook and the page number of the associated fact sheet.