On distillation with phosphorus sulphide it gives cymene.
2
On distillation with zinc dust it forms cymene (1.4 methyl isopropyl benzene).
3
Terephthalic acid, formed by oxidizing para-diderivatives of benzene, or best by oxidizing caraway oil, a mixture of cymene and cuminol, with chromic acid, as almost insoluble in water, alcohol and ether; it sublimes without melting when heated.
4
This is distilled to dryness and the distillate repeatedly recrystallized from cymene.