A yellow - orange or reddish liquid with a herbaceous - spicy medicinal odour, much likes thyme.Thymol, pinene, cymene, dipentene, terpinene and carvacrol, among others. Ajowan contains 40 - 55% of thymol. The extraction of thymol is produced by treating the oil with a warm solution of sodium hydroxide; this alkali dissolves the thymol and on dilution with hot water the undissolved oil (terpenes, etc.) rises to the surface. |