iobenzamic acid iobenzamic acid iobenzamic acid is a pharmaceutical drug used as an x-ray contrast agent. iobenzamic acidclinical dataatc codev08ac05 (who) identifiers iupac name 3-propanoic acid cas number3115-05-7pubchem cid18377drugbankdb13428chemspider17355uniif72uwg2swkkeggd01313comptox dashboard (epa)dtxsid9057711 echa infocard100.019.531 chemical and physical dataformulac16h13i3n2o3molar mass662.004 g·mol−13d model (jsmol)interactive image smiles ic1c(c(i)c(n)c(i)c1)c(=o)n(c2ccccc2)ccc(=o)o inchi inchi=1s/c16h13i3n2o3/c17-10-8-11(18)15(20)14(19)13(10)16(24)21(7-6-12(22)23)9-4-2-1-3-5-9/h1-5,8h,6-7,20h2,(h,22,23)key:fjyjnliegutpij-uhfffaoysa-n