The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present. Everyone is exposed to low levels of cobalt in air, water, and food. Exposure to higher levels of cobalt occurs in the workplace. Cobalt has both beneficial and harmful effects on health. This chemical has been found in at least 336 of 1,416 National Priorities List sites identified by the Environmental Protection Agency.
Cobalt is a compound that occurs in nature.
It occurs in many different chemical forms. Pure cobalt is a steel-gray, shiny, hard metal. Cobalt is not currently mined in the United States. All cobalt used in industry is imported or obtained by recycling scrap metal that contains cobalt. Small amounts of cobalt naturally occur in food.