In the title compound, C(10)H(14)ClN(5), the imidazole and pyrimidine rings are essentially planar [maximum deviation = 0.0013 (14) and 0.0207 (13) Å, respectively]. In the crystal, the mol-ecules are linked by weak C-H⋯N inter-actions into chains parallel to the c axis and the crystal packing is stabilized by additional weak C-H⋯N and C-H⋯Cl inter-actions.