Potassium iodate may be used to protect against accumulation of radioactive iodine in the thyroid by saturating the body with a stable source of iodine prior to exposure . Approved by the World Health Organization for radiation protection , potassium iodate ( KIO3 ) is an alternative to potassium iodide ( KI ) , which has poor shelf life in hot and humid climates . The UK , Singapore , United Arab Emirates , and the U.S. states Idaho and Utah are known to stock potassium iodate in tablet form . The government of Ireland also , following the September 11 attacks , issued potassium iodate tablets to all households . It is not approved by the U.S. Food and Drug Administration ( FDA ) for use as a thyroid blocker , and the FDA has taken action against US websites that promote this use
September 11 attacks
September 11 attacks
Potassium iodate