perflubron perflubron perflubron (inn/usan, or perfluorooctyl bromide; brand name imagent) is a contrast medium for magnetic resonance imaging, computer tomography and sonography. it was approved for this use in the united states by the food and drug administration in 1993. perflubronclinical dataatc codev08cx01 (who) identifiers iupac name 1-bromo-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluorooctane cas number423-55-2pubchem cid9873chemspider9489uniiq1d0q7r4d9chemblchembl1200866comptox dashboard (epa)dtxsid5046560 echa infocard100.006.391 chemical and physical dataformulac8brf17molar mass498.965 g·mol−13d model (jsmol)interactive imagedensity1.93 g/cm3melting point6 °c (43 °f)boiling point142 °c (288 °f) smiles fc(f)(c(f)(f)c(br)(f)f)c(f)(f)c(f)(f)c(f)(f)c(f)(f)c(f)(f)f inchi inchi=1s/c8brf17/c9-7(22,23)5(18,19)3(14,15)1(10,11)2(12,13)4(16,17)6(20,21)8(24,25)26key:wtwwxogtjwmjhi-uhfffaoysa-n experimental research for more information on this potential application, see liquid breathing § medical treatment. perflubron has also been tested experimentally for use in liquid breathing in premature infants with respiratory distress. this molecular model of perflubron is color-coded by electron density to illustrate the positive polarisation of the large bromine atom by the inductively electron-withdrawing perfluorooctyl chain.