Dantrolene Sodium Heptahydrate and its Impurities

Dantrolene sodium heptahydrate is a skeletal muscle relaxant used to treat malignant hyperthermia and severe muscle spasticity by inhibiting calcium release from the sarcoplasmic reticulum. Reference standards of Dantrolene Sodium Heptahydrate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.