In organic compound terms the difference between toluene and nitrobenzene

is that toluene is a colourless, inflammable liquid hydrocarbon, methylbenzene, CH₃.C₆H₅, used as a solvent, in high-octane fuels and in the production of many chemical compounds while nitrobenzene is a nitro derivative of benzene, C₆H₅NO₂, prepared by reacting benzene with a mixture of nitric and sulphuric acids; any of a series of such compounds having two or more nitro groups.