CuC8N3H4O4O2 crystallizes in the monoclinic P2_1/c space group. The structure consists of four hydrogen peroxide molecules inside a CuC8N3H4O4 framework. In the CuC8N3H4O4 framework, Cu(1) is bonded in a square pyramidal geometry to one N(1), one N(3), one O(1), one O(3), and one O(4) atom. The Cu(1)-N(1) bond length is 1.98 Å. The Cu(1)-N(3) bond length is 2.01 Å. The Cu(1)-O(1) bond length is 1.98 Å. The Cu(1)-O(3) bond length is 2.02 Å. The Cu(1)-O(4) bond length is 2.25 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one N(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(5) bond length is 1.50 Å. The C(1)-N(1) bond length is 1.35 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(6), and one N(2) atom. The C(2)-C(6) bond length is 1.51 Å. The C(2)-N(2) bond length is 1.35 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one N(2), and one H(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-N(2) bond length is 1.33 Å. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one H(2) atom. The C(4)-N(1) bond length is 1.34 Å. The C(4)-H(2) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(5)-O(1) bond length is 1.30 Å. The C(5)-O(2) bond length is 1.24 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(6)-O(3) bond length is 1.28 Å. The C(6)-O(4) bond length is 1.26 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(3), and one H(3) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-N(3) bond length is 1.34 Å. The C(7)-H(3) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(7), one N(3), and one H(4) atom. The C(8)-N(3) bond length is 1.34 Å. The C(8)-H(4) bond length is 1.09 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a bent 120 degrees geometry to one C(2) and one C(3) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Cu(1), one C(7), and one C(8) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(5) atom. In the third O site, O(3) is bonded in a water-like geometry to one Cu(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Cu(1) and one C(6) atom. Linkers: 4 [O]C(=O)c1nccnc1C([O])=O ,2 c1cnccn1. Metal clusters: 4 [Cu]. The MOF has largest included sphere 2.02 A, density 1.93 g/cm3, surface area 3837.99 m2/g, accessible volume 0.16 cm3/g