Norfloxacin CAS No. 70458-96-7 Chemical name 1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3- quinolinecarboxylic acid Molecular formula C16H18FN3O3 Molecular weight 319.3349 Applications A fluoroquinolone, synthetic, broad-spectrum antibacterial agent for oral administration. Appearance Almost white crystalline powder. Specification BP/USP/EP