The title coordination polymer, {[Zn(H(2)O)(6)](0.5)[Zn(C(8)H(3)O(7)S)(C(5)H(6)N(6))]·1.5H(2)O}(n), synthesized under hydro-thermal conditions, possesses a one-dimensional tube-like chain structure along [100], with octahedral [Zn(H(2)O)(6)](2+) groups ([Formula: see text] symmetry) trapped in the pores. The other Zn atom is five-coordinated in a highly distorted trigonal-biyramidal coordin-ation that is defined by two different N atoms from two 1,3-bis-(1,2,4-triazol-1-yl)methane (btrm) ligands and three carboxyl-ate O atoms from 5-sulfonato-benzene-1,3-dicarboxyl-ate ligands. The chains carry negative charges, whereas the free [Zn(H(2)O)(6)](2+) cations are positively charged. The [Zn(H(2)O)(6)](2+) cation is connected with the one-dimensional tubelike chain through weak classical O-H⋯O and O-H⋯N hydrogen-bonding inter-actions as well as through electrostatic inter-actions. One of the two uncoordinated water molecules exhibits half-occupancy.