D 1812 (OTTO) 3,5 Difluorobromo benzene, 98% Cas 461-96-1 - used in the synthesis of 4-bromo-2,6-difluorobenzoic acid. D 1812 (OTTO) 3,5 Difluorobromo benzene, 98% Cas 461-96-1 - used in the synthesis of selective antagonists of GluN2C/GluN2D is used in the synthesis of COX-2 inhibitors as anti-inflammatory agents and anti-cancer agents.