The gas component may be ethane , propane, butane, carbon dioxide, or hydrogen sulphide, but is most commonly methane.
It consists mainly of methane, the simplest hydrocarbon, as well as small amounts of heavier, more complex hydrocarbons such as ethane , butane and propane.
The samples showed high concentrations of methane, ethane , butane, and propane, gases in a class of hydrocarbons called alkanes.
For example, the alcohol derivative of methane is methanol and of ethane is ethanol.
Some familiar examples include methane, ethane , propane, and kerosene.
Earth-based and space-based observers have long known that Titan's atmosphere contains methane, ethane , acetylene and many other hydrocarbon compounds.