Cobalt

Source: Used in medical technology and radiation treatment for cancer. Used in steel alloys to create drill bits and strong materials. Occurs naturally in rocks and minerals.

Water Treatment: https://tdb.epa.gov/tdb/contaminant?id=10640

Summary: Cobalt is element 27 on the Periodic Table. It is found naturally in rocks and minerals. Usually mined in ores, the most abundant source of cobalt is found in the core of the Earth. Cobalt is used in steel alloys to produce strong materials used in drill bits, magnets, and aircraft engines. Cyanobacteria consume cobalt as a macronutrient in trace amounts. Cobalt is known for its deep blue color that can be seen in colored glass, ceramics, and paints. Cobalt-60 is a radioactive isotope of Cobalt that has a half-life of 5.3 years. This isotope may be produced synthetically in nuclear reactors for medical uses such as radiation treatment for cancer. Cobalt-60 can also occur as fallout from the testing of nuclear bombs. Other uses for cobalt in the medical industry include in artificial limbs and joints, and in nanofibers in medical technology. Cobalt exists as a black powder at room temperature and has a density of 8.9 g/mL at 20 C.

GHS Hazard Statement: H302, H317, H319, H330, H334, H335, H350, H350i, H351, H360F, H361, H372, H373, H400 ,H410, H413, GHS06, GHS07, GHS08, GHS09