Small Magnets
Cobalt is a naturally occurring element in the earth's crust. It is a very small part of our environment. Cobalt is a component of vitamin B12, which supports the production of red blood cells. Very small amounts are needed for animals and humans to stay healthy. Cobalt poisoning can occur when you are exposed to large amounts of it. There are three basic ways that cobalt can cause poisoning. You can swallow too much of it, breathe too much into your lungs, or have it come in constant contact with your skin.
Cobalt poisoning can also occur from the wear and tear of some cobalt/chromium metal-on-metal hip implants. This type of implant is an artificial hip socket that is created by fitting a metal ball into a metal cup. Sometimes, metal particles (cobalt) are released as the metal ball grinds against the metal cup when you walk. These metal particles (ions) can get released into the hip socket and sometimes the bloodstream, causing cobalt toxicity.
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This article is for information only. DO NOT use it to treat or manage an actual poison exposure. If you or someone you are with has an exposure, call your local emergency number (such as 911), or your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States.
Cobalt is a component of vitamin B12, an essential vitamin.
Cobalt is also found in:
- Alloys
- Batteries
- Chemistry/crystal sets
- Drill bits, saw blades, and other machine tools
- Dyes and pigments (cobalt blue)
- Magnets
- Some metal-on-metal hip implants
- Tires
Cobalt was once used as a stabilizer in beer foam. It caused a condition called 'beer-drinker's heart,' which resulted in heart muscle weakness.
This list may not be all-inclusive.
Usually you have to be exposed to high levels of cobalt for weeks to months to have symptoms. However, it is possible to have some symptoms if you swallow a large amount of cobalt at once.
The most worrisome form of cobalt poisoning occurs when you breathe too much into your lungs. This usually will only happen in industrial settings where large amounts of drilling, polishing, or other processes release fine particles containing cobalt into the air. Breathing in this cobalt dust can lead to chronic lung problems. If you breathe in this substance for long periods, you will likely develop breathing problems that are similar to asthma or pulmonary fibrosis, such as shortness of breath and decreased exercise tolerance.
Cobalt poisoning that occurs from constant contact with your skin will likely cause irritation and rashes that go away slowly.
Swallowing a large amount of absorbable cobalt at one time is very rare and is likely not very dangerous. It may cause nausea and vomiting. However, absorbing a large amount of cobalt over longer periods of time can lead to serious health problems, such as:
- Cardiomyopathy (a problem where your heart becomes big and floppy and has problems pumping blood)
- Deafness
- Nerve problems
- Ringing in the ears (tinnitus)
- Thickening of the blood
- Thyroid problems
- Vision problems
If you or someone you know has been exposed to cobalt, the first step is to leave the area and get fresh air. If cobalt came in contact with the skin, wash the area thoroughly.
If possible, determine the following information:
- Person's age, weight, and condition (for example, is the person awake or alert?)
- Name of the product (ingredients and strengths, if known)
- Time it was swallowed
- Amount swallowed
However, DO NOT delay calling for help if this information is not immediately available.
Your local poison control center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States. This hotline will let you talk to experts in poisoning. They will give you further instructions.
This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.
Small Magnets That Are Strong
If you swallowed a large amount of cobalt, or you are starting to feel sick from long-term exposure, you should go to an emergency room.
Treatment for skin contact: Since these rashes are rarely serious, very little will be done. The area may be washed and a skin cream may be prescribed.
Treatment for lung involvement: Breathing problems will be treated based on your symptoms. Breathing treatments and medications to treat swelling and inflammation in your lungs may be prescribed. Blood and urine tests, x-rays and ECG (electrocardiogram, or heart tracing) may be done.
Treatment for swallowed cobalt: The health care team will treat your symptoms and order some blood tests. Blood and urine tests, x-rays and ECG (electrocardiogram, or heart tracing) may be performed. In the rare case that you have large levels of cobalt in your blood, you may need hemodialysis (kidney machine) and get medicines (antidotes) to reverse the effects of the poison.
Treatment for signs of cobalt toxicity from a metal-on-metal hip implant may include removing the implant and replacing it with a traditional hip implant.
People who get sick from being exposed to large amounts of cobalt on one single occasion usually recover and have no long-term complications.
The symptoms and problems associated with long-term cobalt poisoning are rarely reversible. People who have such poisoning will likely have to take medicine for the rest of their life to control the symptoms.
Aronson JK. Cobalt. In: Aronson JK, ed. Meyler's Side Effects of Drugs. 16th ed. Waltham, MA: Elsevier; 2016:490-491.
Lombardi AV, Bergeson AG. Evaluation of the failed total hip arthroplasty: history and physical examination. In: Scuderi GR, ed. Techniques in Revision Hip and Knee Arthroplasty. Philadelphia, PA: Elsevier Saunders; 2015:chap 38.
U.S. National Library of Medicine, Specialized Information Services, Toxicology Data Network website. Cobalt, elemental. toxnet.nlm.nih.gov. Updated September 5, 2017. Accessed January 17, 2019.
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Emeritus, Virginia Mason Medical Center, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
An international research team led by a physicist at the University of California, Riverside, has identified a microscopic process of electron spin dynamics in nanoparticles that could impact the design of applications in medicine, quantum computation, and spintronics.
Magnetic nanoparticles and nanodevices have several applications in medicine — such as drug delivery and MRI — and information technology. Controlling spin dynamics — the movement of electron spins — is key to improving the performance of such nanomagnet-based applications.
“This work advances our understanding of spin dynamics in nanomagnets,” said Igor Barsukov, an assistant professor in the Department of Physics and Astronomy and lead author of the study that appears today in Science Advances.
Electron spins, which precess like spinning tops, are linked to each other. When one spin begins to precess, the precession propagates to neighboring spins, which sets a wave going. Spin waves, which are thus collective excitations of spins, behave differently in nanoscale magnets than they do in large or extended magnets. In nanomagnets, the spin waves are confined by the size of the magnet, typically around 50 nanometers, and therefore present unusual phenomena.
In particular, one spin wave can transform into another through a process called “three magnon scattering,” a magnon being a quantum unit of a spin wave. In nanomagnets, this process is resonantly enhanced, meaning it is amplified for specific magnetic fields.
In collaboration with researchers at UC Irvine and Western Digital in San Jose, as well as theory colleagues in Ukraine and Chile, Barsukov demonstrated how three magnon scattering, and thus the dimensions of nanomagnets, determines how these magnets respond to spin currents. This development could lead to paradigm-shifting advancements.
“Spintronics is leading the way for faster and energy-efficient information technology,” Barsukov said. “For such technology, nanomagnets are the building blocks, which need to be controlled by spin currents.”
Small Magnets Circle
Barsukov explained that despite its technological importance, a fundamental understanding of energy dissipation in nanomagnets has been elusive. The research team’s work provides insights into the principles of energy dissipation in nanomagnets and could enable engineers who work on spintronics and information technology to build better devices.
“Microscopic processes explored in our study may also be of significance in the context of quantum computation where researchers currently are attempting to address individual magnons,” Barsukov said. “Our work can potentially impact multiple areas of research.”
Barsukov was joined in the research by H. K. Lee, A. A. Jara, Y.-J. Chen, A. M. Gonçalves, C. Sha, and I. N. Krivorotov of UC Irvine; J. A. Katine of Western Digital in San Jose; R. E. Arias of the University of Chile in Santiago; and B. A. Ivanov of the National Academy of Sciences of Ukraine and the National University of Science and Technology in Russia.
The collaborative study was primarily funded by the U.S. Army Research Office, Defense Threat Reduction Agency, and National Science Foundation, or NSF, as well as by agencies in Chile, Brazil, Ukraine, and Russia. Barsukov was funded by the NSF under grant ECCS-1810541.