D 1805 (OTTO) m-Difluorobenzene, 99% Cas 372-18-9 - used in the laser induced fluorencence matrix study of 1,3-difluorobenzene radical cation. D 1805 (OTTO) m-Difluorobenzene, 99% Cas 372-18-9 - used synthesis of 1,2,3-triazole containing fluconazole .analogues.