levothyroxine sodium and its Impurities
It is a soidium salt of Levothyroxine, a synthetic form of thyroid hormone, Thyroxine. Levothyroxine is used in the treatment of thyroid hormone deficiency and certain types of thyroid tumors. It is a levorotatory enantiomer of Thyroxine. Reference standards of Levothyroxine Sodium API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.