CAS ID #: 7440-35-9
Affected Organ Systems: Musculoskeletal (Muscles and Skeleton), Neurological (Nervous System)
Cancer Classification: None
Chemical Classification: Radionuclides (radioactive materials)
Summary: Americium is a man-made radioactive chemical. Americium has no naturally occurring or stable isotopes. Two important isotopes of americium are americium 241 (241Am) (read as americium two-forty-one) and 243Am. Both isotopes have the same chemical behavior in the environment and the same chemical effects on your body. 241Americium is used in ionization smoke detectors. There is no broad commercial use for 243Am. Nuclear reactors, nuclear explosions, or the radioactive transformation of plutonium can produce both 241Am and 243Am. These isotopes transform by giving off alpha radiation and turning into radionuclides of other elements. The half-life of a radioactive material is the time it takes for half of the material to give off its radiation. The half-life of 241Am is 432 years and that of 243Am is 7,370years.
Toxicological and Health Professionals
Succinctly characterizes the toxicologic and adverse health effects information for a hazardous substance.
Prioritization of substances based on a combination of their frequency, toxicity, and potential for human exposure at National Priorities List (NPL) sites.
The MRL is an estimate of the daily human exposure to a hazardous substance that is likely to be without appreciable risk of adverse, non-cancer health effects over a specified duration of exposure. The information in this MRL serves as a screening tool to help public health professionals decide where to look more closely to evaluate possible risk of adverse health effects from human exposure.
- Page last reviewed: March 3, 2011
- Page last updated: March 3, 2011
- Content source: Agency for Toxic Substances and Disease Registry