Alkanes are chemical compounds that consist only of the elements carbon and hydrogen linked exclusively by single bonds.
Each carbon atom forms 4 bonds (either C-H or C-C bonds). Each hydrogen atom is connected to a single carbon atom, by a H-C bond.
The alkanes have two main commercial sources: petroleum and natural gas.
Saturated oils and waxes are examples of larger alkanes in which the number of carbon atoms in the carbon chain is greater than 10.