Benzene derivatives have from one to six substituents attached to the central benzene core. BTX stands for benzene, toluene, xylene. Xylenes are produced by the methylation of toluene and benzene. It is very soluble in acetone, benzene, diethyl ether and ethanol. Gasoline contains benzene and other known carcinogens. PLA is soluble in solvents, hot benzene, tetrahydrofuran, and dioxane. It is soluble in alcohol, ether, benzene and chloroform. The second ranked application involves its disproportionation to a mixture of benzene and xylene. The experiment included the chemicals benzene, TCE, and formaldehyde. Another route to styrene involves the reaction of benzene and ethane. Benzene and many antiknocking additives are carcinogenic. A naphthalene molecule can be viewed as the fusion of a pair of benzene rings. It is soluble in hot water, alcohol, benzene, chloroform, and ether. In contrast to benzene ring, pyridine efficiently supports several nucleophilic substitutions. Despite the structural and bonding commonalities of benzene and pyridine, their reactivity differ significantly.