IPROFENIN is an iminodiacetic acid derivative. Its 99mTc radiolabelled form was used in cholescintigraphy and hepatobiliary scintigraphy to diagnose problems of the liver, gallbladder and bile ducts.

Proclonol is a cyclopropylmethanol derivative patented by Belgium pharmaceutical company Janssen Pharmaceutica N. V. as an arachnicide and fungicide. Tetranychus urticae in the adult stage on bean plants were killed within 3 days with a spray contg. 35 ppm. Proclonol, while all of the larval stage on strawberry leaves was killed by 62.5 ppm., and no eggs sprayed with 40 ppm. hatched. A suspension of 500 ppm. Proclonol used to dip strawberry leaves infested with Tarsonemus pallidus killed 96.2% of the mites.

Ioglunide is an iodobenzene derivative patented by Laboratoires Andre Guerbet as an oil-based X-ray contrast medium. Iophendylate was commonly used in conventional myelography from the 1940s to the late 1980s before the utilization of computed tomography (CT), magnetic resonance imaging (MRI) and water-soluble contrast agents. Ioglunide, which was never shown to be safe, was initially introduced for use in small amounts for locating spinal tumors. It next appeared on the world scene for high volume, routine use, in diagnosing disc herniations.

Iofratol, is a dimeric, hexaiodinated radiographic contrast agent that was being developed by Bracco as a potential X-ray contrast medium for angiography and myelography.

Iosarcol (also known as Melitrast) is an iodinated nonionic monomeric contrast medium patented by Dr. Franz Koehler and Chemie KG for radiographic imaging.

Iolixanic Acid is triiodophenoxyalkoxyalkanoic acid derivative patented by Bracco Industria Chimica S.p.A. as a diagnostic agent for cholecystography and urinary tract imaging

Ioglucomide is triiodoanilide derivative patented by Mallinckrodt, Inc. as nonionic x-ray contrast media for myelography. In preclinical studies the efficacy of ioglucomide and metrizamide were comparable. However, acute toxicity after intravenous injection or installation into cerebrospinal fluid was significantly less for ioglucomide. Also, in contrast to metrizamide, ioglucomide produced no evidence of any type of convulsive activity after subarachnoid administration.

Troxolamide is a targeted ultrasound contrast diagnostic agent.

Iozomic Acid is triiodobenzoic acid derivative patented by Pharmacia Aktiebolag as X-ray contrast agent for Coronary Angiography.

Iolixanic Acid is triiodophenoxyalkoxyalkanoic acid derivative patented by Bracco Industria Chimica S.p.A. as diagnostic agent for cholecystography.