This record contains information for cobalt in its zero valence state only. For general toxicity and environmental fate of cobalt ions and cobalt compounds, refer to the COBALT COMPOUNDS record; for compound specific information, refer to the appropriate individual records, e.g., cobalt acetate, cobalt succinate, etc. For information on the radiological aspects of cobalt and its compounds, refer to the COBALT, RADIOACTIVE record. For general toxicological, safety and handling, and environmental information on ionizing radiation emitted from chemical sources i