hexafluronium bromide hexafluronium bromide hexafluronium (or hexafluorenium) is a muscle relaxant. it acts as a nicotinic acetylcholine receptor antagonist. hexafluroniumclinical dataatc codem03ac05 (who) identifiers iupac name n,n-di-9h-fluoren-9-yl-n,n,n',n'-tetramethylhexane-1,6-diaminium dibromide cas number317-52-2 npubchem cid9434drugbankdb00941 ychemspider9063 yuniib64njg83k2keggd04435 ycomptox dashboard (epa)dtxsid6048753 echa infocard100.005.697 chemical and physical dataformulac36h42br2n2molar mass662.554 g·mol−13d model (jsmol)interactive image smiles ..c1cccc3c1c2c(cccc2)c3(cccccc(c6c4ccccc4c5ccccc56)(c)c)(c)c inchi inchi=1s/c36h42n2.2brh/c1-37(2,35-31-21-11-7-17-27(31)28-18-8-12-22-32(28)35)25-15-5-6-16-26-38(3,4)36-33-23-13-9-19-29(33)30-20-10-14-24-34(30)36;;/h7-14,17-24,35-36h,5-6,15-16,25-26h2,1-4h3;2*1h/q+2;;/p-2 ykey:wdefpruezruynw-uhfffaoysa-l y ny (what is this?) (verify)