Abstract
In the title hydrated salt, C
7
H
9
ClN
+
·Cl
−
·0.5H
2
O, the water O atom lies on a crystallographic twofold axis. In the crystal, the monoprotonated 4-chlorobenzylammonium cation forms N—H⋯Cl and N—H⋯O hydrogen bonds and the water molecule forms O—H⋯Cl hydrogen bonds, generating layers lying parallel to the
bc
plane.