Propyliodone (

INN Inns are generally establishments or buildings where travelers can seek lodging, and usually, food and drink. Inns are typically located in the country or along a highway; before the advent of motorized transportation they also provided accommo ...

, trade name Dionosil) is a molecule used as a

contrast medium A contrast agent (or contrast medium) is a substance used to increase the contrast of structures or fluids within the body in medical imaging. Contrast agents absorb or alter external electromagnetism or ultrasound, which is different from radiop ...

bronchography Bronchography is a radiological technique, which involves x-raying the respiratory tree after coating the airways with contrast. Bronchography is rarely performed, as it has been made obsolete with improvements in computed tomography and broncho ...

. It was developed by a team at

Imperial Chemical Industries Imperial Chemical Industries (ICI) was a British chemical company. It was, for much of its history, the largest manufacturer in Britain. It was formed by the merger of four leading British chemical companies in 1926. Its headquarters were at M ...

GB 517382 in the late 1930s.

References

Iodoarenes Carboxylate esters 4-Pyridones Radiocontrast agents Propyl esters {{Pharmacology-stub