Phthalic anhydride is a white solid obtained from partial oxidation with air of o-xylene on a solid bed. It is used in solid form in sacks of 500 kg or in molten form.

Maleic anhydride is a solid at room temperature, which is obtained from the partial oxidation with air of n-butane on a solid bed. The main industrial application of maleic anhydride is glycol polymerization and unsaturated epoxides linear with polyesters. It is sold in liquid form, in cisterns at a temperature no lower than 52ºC.

Cyclohexane is a naphthene produced by benzene hydrogenation. Its main use is the synthesis of cyclohexanol/cyclohexanone for the production of the caprolactam, a precursor to nylon.