五嗪（Pentazine）是含有五个氮原子的六元杂环化合物，不稳定，分子式为CHN₅。

• 吡啶、二嗪、三嗪、四嗪、六嗪

Pentazine is an unstable compound that consists of a six-membered aromatic ring containing five nitrogen atoms with the molecular formula CHN₅. The name pentazine is used in the nomenclature of derivatives of this compound.