Common hazardous ingredients
Ionizing smoke detectors contain a small amount of radioactive material, Americium-241. Ionizing smoke detectors will have the radioactive symbol on them.
Potential hazards
Low-level radioactivity.
Use
Install and maintain according to manufacturer directions.
Disposal
Best: Return to the manufacturer (address on base of detector) or retailer.
Second best: Dispose of in the garbage.
Alternative
Choose a nonionizing, photoelectric-type detector.