NaC9H9S(NO4)2 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(5), one O(7), and one O(8) atom. The Na(1)-O(2) bond length is 2.35 Å. The Na(1)-O(4) bond length is 2.37 Å. The Na(1)-O(5) bond length is 2.40 Å. The Na(1)-O(7) bond length is 2.37 Å. The Na(1)-O(8) bond length is 2.41 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(1)-C(3) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.32 Å. The C(1)-O(2) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(2)-C(5) bond length is 1.49 Å. The C(2)-O(3) bond length is 1.34 Å. The C(2)-O(4) bond length is 1.23 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(8) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(3) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(5)-C(6) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one H(4) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-H(4) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(6), one C(8), and one S(1) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-S(1) bond length is 1.79 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(3), one C(7), and one H(5) atom. The C(8)-H(5) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one N(1), one N(2), and one O(8) atom. The C(9)-N(1) bond length is 1.35 Å. The C(9)-N(2) bond length is 1.35 Å. The C(9)-O(8) bond length is 1.27 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(9), one H(6), and one H(7) atom. The N(1)-H(6) bond length is 1.02 Å. The N(1)-H(7) bond length is 1.01 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one C(9), one H(8), and one H(9) atom. The N(2)-H(8) bond length is 1.03 Å. The N(2)-H(9) bond length is 1.01 Å. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(8) atom. The H(1)-O(1) bond length is 1.04 Å. The H(1)-O(8) bond length is 1.49 Å. In the second H site, H(2) is bonded in a distorted linear geometry to one O(3) and one O(7) atom. The H(2)-O(3) bond length is 1.02 Å. The H(2)-O(7) bond length is 1.61 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(1) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(1) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(2) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one N(2) atom. S(1) is bonded in a distorted trigonal non-coplanar geometry to one C(7), one O(5), one O(6), and one O(7) atom. The S(1)-O(5) bond length is 1.47 Å. The S(1)-O(6) bond length is 1.46 Å. The S(1)-O(7) bond length is 1.49 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one C(1) and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one C(2) and one H(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Na(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one S(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one S(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Na(1), one H(2), and one S(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one C(9), and one H(1) atom. Linkers: 4 [O]S([O])([O])c1cc(C(=O)O)cc(C(=O)O)c1. Metal clusters: 4 [Na]. RCSR code: fes. The MOF has largest included sphere 2.44 A, density 1.64 g/cm3, surface area 3849.09 m2/g, accessible volume 0.13 cm3/g