二十九烷是一个化学式为C₂₉H₆₀的直链烷烃。它有1,590,507,121个结构异构体。

Nonacosane is a straight-chain hydrocarbon with a molecular formula of C₂₉H₆₀, and the structural formula CH₃(CH₂)₂₇CH₃. It has 1,590,507,121 constitutional isomers.

Nonacosane occurs naturally and has been reported to be a component of a pheromone of Orgyia leucostigma, and evidence suggests it plays a role in the chemical communication of several insects, including the female Anopheles stephensi (a mosquito).