isometamidium chloride isometamidium chloride isometamidium chloride is a triazene trypanocidal agent used in veterinary medicine. isometamidium chlorideclinical dataatcvet codeqp51ax19 (who) identifiers iupac name 3-hydrazino]benzamidine chloride cas number34301-55-8pubchem cid92295chemspider83326unii7nh28i651fcomptox dashboard (epa)dtxsid10955855 echa infocard100.047.191 chemical and physical dataformulac28h26cln7molar mass496.02 g·mol−13d model (jsmol)interactive image smiles .=c(n)c1cc(ccc1)n/n=n/c4ccc3c2ccc(n)cc2(c(c3c4)c5ccccc5)cc inchi inchi=1s/c28h25n7.clh/c1-2-35-26-16-20(29)11-13-24(26)23-14-12-22(17-25(23)27(35)18-7-4-3-5-8-18)33-34-32-21-10-6-9-19(15-21)28(30)31;/h3-17,29h,2h2,1h3,(h4,30,31,32,33);1hkey:qnzjtsgalavclh-uhfffaoysa-n it consists of a single ethidium bromide like subunit linked to a fragment of the diminazene molecule. resistance the gibe river valley in southwest ethiopia showed universal resistance between july 1989 and february 1993. this likely indicates a permanent loss of function in this area against the tested target, t. congolense isolated from boran cattle.