2,4-Diamino-6-methyl-1,3,5-triazin-1-ium chloride.

In the title compound, C(4)H(8)N(5) (+)·Cl(-), a two-dimensional layer packing network is observed in which every chloride anion links three adjacent 2,4-diamino-6-methyl-1,3,5-triazin-1-ium cations by N-H⋯Cl hydrogen-bonding inter-actions, forming 12-membered and eight-membered hydrogen-bonded rings with graph-set motifs R(4) (4)(12) and R(3) (3)(8), respectively. In addition, N-H⋯N hydrogen bonds are found between adjacent cations, forming another type of eight-membered [R(2) (2)(8)] hydrogen-bonded ring.