Phenazin-5-ium hydrogen sulfate monohydrate

The crystal structure of the title salt, C₁₂H₉N₂⁺·HSO₄⁻·H₂O, comprises inversion-related pairs of phenazinium ions linked by C—H...N hydrogen bonds. The phenazinium N—H atoms are hydrogen bonded to the bis­ulfate anions. The bis­ulfate anions and water mol­ecules are linked by O—H...O hydrogen-bonding inter­actions into a structural ladder motif parallel to the a axis.