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Clinical data
Synonyms Iodocholesterol; 19-Iodocholesterol; Iodocholesterol (131I); 19-Iodocholest-5-en-3β-ol
ATC code
CAS Number
PubChem CID
ECHA InfoCard 100.048.618 Edit this at Wikidata
Chemical and physical data
Formula C27H45IO
Molar mass 510.561 g/mol
3D model (JSmol)
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Iodocholesterol, or 19-iodocholesterol, also as iodocholesterol (131I) (INN), is a derivative of cholesterol with an iodine atom in the C19 position and a radiopharmaceutical.[1][2] When the iodine atom is a radioactive isotope (iodine-125 or iodine-131), it is used as an adrenal cortex radiocontrast agent in the diagnosis of patients suspected of having Cushing's syndrome, hyperaldosteronism, pheochromocytoma, and adrenal remnants following total adrenalectomy.[1][2]


  1. ^ a b J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 692–. ISBN 978-1-4757-2085-3. 
  2. ^ a b Orlo H. Clark; American Cancer Society (2003). Endocrine Tumors. PMPH-USA. pp. 124–. ISBN 978-1-55009-134-2.