CdC2N3H5SO5 crystallizes in the triclinic P-1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent N(2), two equivalent O(3), and two equivalent O(4) atoms to form CdN2O4 octahedra that share corners with four equivalent S(1)O4 tetrahedra. Both Cd(1)-N(2) bond lengths are 2.30 Å. Both Cd(1)-O(3) bond lengths are 2.34 Å. Both Cd(1)-O(4) bond lengths are 2.35 Å. In the second Cd site, Cd(2) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms to form CdN2O4 octahedra that share corners with two equivalent S(1)O4 tetrahedra. Both Cd(2)-N(1) bond lengths are 2.28 Å. Both Cd(2)-O(1) bond lengths are 2.39 Å. Both Cd(2)-O(2) bond lengths are 2.38 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(1) atom. The C(1)-N(1) bond length is 1.36 Å. The C(1)-N(2) bond length is 1.33 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(1), one N(3), and one H(2) atom. The C(2)-N(1) bond length is 1.34 Å. The C(2)-N(3) bond length is 1.33 Å. The C(2)-H(2) bond length is 1.08 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(1), and one C(2) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one N(3) atom. The N(2)-N(3) bond length is 1.36 Å. In the third N site, N(3) is bonded in a 2-coordinate geometry to one C(2), one N(2), and one H(3) atom. The N(3)-H(3) bond length is 1.06 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a linear geometry to one N(3) and one O(5) atom. The H(3)-O(5) bond length is 1.59 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(1) atom. The H(4)-O(1) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(1) and one O(3) atom. The H(5)-O(1) bond length is 0.99 Å. The H(5)-O(3) bond length is 1.75 Å. S(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SO4 tetrahedra that share  a cornercorner with one Cd(2)N2O4 octahedra and corners with two equivalent Cd(1)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. The S(1)-O(2) bond length is 1.51 Å. The S(1)-O(3) bond length is 1.51 Å. The S(1)-O(4) bond length is 1.48 Å. The S(1)-O(5) bond length is 1.48 Å. There are five inequivalent O sites. In the first O site, O(5) is bonded in a bent 120 degrees geometry to one H(3) and one S(1) atom. In the second O site, O(1) is bonded in a distorted water-like geometry to one Cd(2), one H(4), and one H(5) atom. In the third O site, O(2) is bonded in a 1-coordinate geometry to one Cd(2) and one S(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Cd(1), one H(5), and one S(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one S(1) atom. Linkers: 1 [CH]1N=C[N]N1 ,1 c1nc[nH]n1. Metal clusters: 2 [Cd]. The MOF has largest included sphere 2.45 A, density 2.53 g/cm3, surface area 2963.59 m2/g, accessible volume 0.08 cm3/g