1. Reference Doses (RfD): Estimates of daily oral exposure levels to the human population that are likely to be without significant risk of adverse health effects during a lifetime. 2. Reference Concentrations (RfC): Estimates of continuous inhalation exposure levels that are likely to be without significant risk of adverse health effects during a lifetime.
Additionally, IRIS assessments include cancer risk information, specifying whether a chemical is likely to be a human carcinogen and estimating the risk levels associated with various exposure scenarios.
