Envirofacts is neither responsible for their informational content nor for their site operation, but provides references to them here as a convenience to our Internet users.
IRIS contains chemical health risk assessments and regulatory information.
EPA's Office of Air Quality Planning and Standards Hazardous Air Pollutants Fact Sheets describe the effects on human health of substances that are defined as hazardous by the 1990 amendments of the Clean Air Act. The Environmental Defense Fund's Chemical Scorecard summarizes information about health effects, hazard rankings, industrial and consumer product uses, environmental releases and transfers, risk assessment values and regulatory coverage. These pages are maintained by the Envirofacts Support Team at the EPA Systems Development Center. For comments, problems or suggestions, please use the Envirofacts Feedback Form. This page was updated July 23, 1998.