This oil was requested by a customer. Please be aware that this chemotype should only be used by the experienced and educated. Cryptone is a ketone. It is a neurotoxic and an irritant. For general infection and congestion of the upper and lower respiratory system, please use a different Eucalyptus. Although ketones are dangerous, they do have their place in specific applications. As well as treating acute sinus and bronchial infections, E. polybractea ct. cryptone is used to treat viral infections of the urogenital tract. It is apparently effective against Human Papilloma Virus as well as malaria.