docosane

from The Century Dictionary.

• noun A colorless compound, CH₃(CH₂)₂₀CH₃, found in paraffin from brown coal and prepared by the reduction of the chlorid C₂₂H₄₄Cl₂. It melts at 44.4° C. and boils at 224.5° C. under 15 millimeters pressure.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry Any alkane having 22 carbon atoms, but especially n-docosane CH3(CH2)20CH3