Hentriacontane, also called untriacontane, is a solid, long-chain alkane hydrocarbon with the structural formula CH₃(CH₂)₂₉CH₃.

It is found in a variety of plants, including peas (pisum sativum), Acacia senegal, Gymnema sylvestris and others, and also comprises about 8-9% of beeswax. It has 10,660,307,791 constitutional isomers.