4-Bromo-3-fluorotoluene (1-bromo-2-fluoro-4-methylbenzene) is an aryl fluorinated building block. Synthesis of 4-bromo-3-fluorotoluene from o-nitro-p-toluidine (Fast Red Base GL), via diazo reaction at high temperature, Sandmeyer reaction, reduction and Schiemann reaction has been reported. Its density and refractive index have been determined.