Ketoconazole is a synthetic antifungal drug used to treat fungal infections, especially in immunocompromised patients. It works by interfering with fungal cell membrane synthesis and certain enzymes. Ketoconazole is structurally similar to imidazole. It is a white to light yellow powder with a molecular weight of 531.43. It is soluble in DMSO and has a purity of 99%. It should be stored at -20°C for long term storage.