CrC8H5O5 crystallizes in the orthorhombic Imma space group. Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing CrO6 octahedra. The corner-sharing octahedral tilt angles are 52°. Both Cr(1)-O(2) bond lengths are 1.90 Å. All Cr(1)-O(1) bond lengths are 1.98 Å. There are three inequivalent C sites. In the first C site, C(2) is bonded in a 4-coordinate geometry to one C(2), one C(3), and two equivalent C(1) atoms. The C(2)-C(2) bond length is 2.07 Å. The C(2)-C(3) bond length is 1.52 Å. Both C(2)-C(1) bond lengths are 1.38 Å. In the second C site, C(3) is bonded in a distorted water-like geometry to one C(2) and two equivalent O(1) atoms. Both C(3)-O(1) bond lengths are 1.36 Å. In the third C site, C(1) is bonded in a 3-coordinate geometry to one C(1), one C(2), and one H(1) atom. The C(1)-C(1) bond length is 1.42 Å. The C(1)-H(1) bond length is 1.14 Å. There are two 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 O(2) atom. The H(2)-O(2) bond length is 1.00 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to two equivalent Cr(1) and one H(2) atom. In the second O site, O(1) is bonded in a bent 150 degrees geometry to one Cr(1) and one C(3) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 4 [Cr]. RCSR code: lvt. The MOF has largest included sphere 6.89 A, density 1.04 g/cm3, surface area 3848.17 m2/g, accessible volume 0.59 cm3/g