Systematic (IUPAC) name
Clinical data
AHFS/ Micromedex Detailed Consumer Information
Pregnancy cat. B(US)
Legal status Prescription only
Routes Intrathecal, intravascular, oral, intracavital
Pharmacokinetic data
Protein binding Low
Metabolism Nil
Half-life Variable
Excretion Renal, unchanged
CAS number 66108-95-0 YesY
ATC code V08AB02
PubChem CID 3730
DrugBank DB01362
ChemSpider 3599 YesY
UNII 4419T9MX03 YesY
KEGG D01817 YesY
ChEBI CHEBI:31709 YesY
Chemical data
Formula C19H26I3N3O9 
Mol. mass 821.138 g/mol
SMILES eMolecules & PubChem
 N(what is this?)  (verify)

Iohexol is a contrast agent, sold under the trade name Omnipaque. It is available in various concentrations, from 140 to 350 milligrams of iodine per milliliter. Omnipaque 350 is commonly used as a contrast agent during coronary angiography.

The osmolality of iohexol ranges from 322 mOsm/kg—approximately 1.1 times that of blood plasma—to 844 mOsm/kg, almost three times that of blood.[1] Despite this difference, iohexol is still considered a low-osmolality contrast agent; the osmolality of older agents, such as diatrizoate, may be more than twice as high.[2]


External links