Synonyms: Phosphonicacid, phenyl-, 4-bromo-2,5-dichlorophenyl methyl ester (8CI,9CI); Phenol, 4-bromo-2,5-dichloro-,methyl phenylphosphonate (8CI); Leptophos OA; Leptophos oxon; Leptophoxon;O-(4-Bromo-2,5-dichlorophenyl) O-methyl phenylphosphonate; Phosvel oxon;Velsicol VCS 506 O-analog