CdC7H3O4CHO crystallizes in the monoclinic P2_1/c space group. The structure consists of eight methanol molecules inside a CdC7H3O4 framework. In the CdC7H3O4 framework, there are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(7), and one O(9) atom. The Cd(1)-O(1) bond length is 2.29 Å. The Cd(1)-O(3) bond length is 2.24 Å. The Cd(1)-O(7) bond length is 2.24 Å. The Cd(1)-O(9) bond length is 2.39 Å. In the second Cd site, Cd(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom. The Cd(2)-O(1) bond length is 2.60 Å. The Cd(2)-O(2) bond length is 2.34 Å. The Cd(2)-O(4) bond length is 2.24 Å. The Cd(2)-O(5) bond length is 2.29 Å. The Cd(2)-O(8) bond length is 2.59 Å. The Cd(2)-O(9) bond length is 2.28 Å. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-C(4) bond length is 1.40 Å. In the third C site, C(3) is bonded in a single-bond geometry to one C(2), one C(5), and one H(3) atom. The C(3)-C(5) bond length is 1.39 Å. The C(3)-H(3) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2) and one H(4) atom. The C(4)-H(4) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(3), one C(6), and one C(8) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-C(8) bond length is 1.50 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(5) atom. The C(6)-H(5) bond length is 0.93 Å. In the seventh C site, C(8) is bonded in a bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.26 Å. The C(8)-O(4) bond length is 1.26 Å. In the eighth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(5), and one O(7) atom. The C(9)-C(10) bond length is 1.50 Å. The C(9)-O(5) bond length is 1.26 Å. The C(9)-O(7) bond length is 1.26 Å. In the ninth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(9) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-C(15) bond length is 1.39 Å. In the tenth C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one H(6) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-H(6) bond length is 0.93 Å. In the eleventh C site, C(12) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(16) atom. The C(12)-C(13) bond length is 1.40 Å. The C(12)-C(16) bond length is 1.50 Å. In the twelfth C site, C(13) is bonded in a single-bond geometry to one C(12) and one H(7) atom. The C(13)-H(7) bond length is 0.93 Å. In the thirteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(10) and one H(8) atom. The C(15)-H(8) bond length is 0.93 Å. In the fourteenth C site, C(16) is bonded in a bent 120 degrees geometry to one C(12), one O(8), and one O(9) atom. The C(16)-O(8) bond length is 1.25 Å. The C(16)-O(9) bond length is 1.26 Å. There are six inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(13) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(15) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cd(1), one Cd(2), and one C(1) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Cd(2) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Cd(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Cd(2) and one C(8) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one C(9) atom. In the sixth O site, O(7) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(9) atom. In the seventh O site, O(8) is bonded in a distorted single-bond geometry to one Cd(2) and one C(16) atom. In the eighth O site, O(9) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(2), and one C(16) atom. Linkers: 8 [O]C(=O)c1cc(O)cc(C([O])=O)c1. Metal clusters: 8 [Cd]. The MOF has largest included sphere 5.58 A, density 1.49 g/cm3, surface area 3113.85 m2/g, accessible volume 0.32 cm3/g