In order to prove the stability of the DUT-76(Cu) towards adsorption/desorption stress we conducted physisorption of C1-C4 hydrocarbons at their standard boiling points over several cycles (see Figure ). We started our experiments with methane physisorption at 111 K, because the methane shows the weakest interactions with the framework among all hydrocarbons. The isotherm shape upon methane physisorption is very similar to that of nitrogen with two steps until p/p0 = 0.2 and then reaching a plateau at p/p0 = 0.3 (see Figure ). The total uptake of methane in plateau is 74.3 mmol•g -1 (at p/p0 = 0.4) corresponding to TPV of 2.81 cm 3 •g -1 . These TPV of DUT-76(Cu) differ depending on the adsorbed hydrocarbon an in-depth discussion is given below (see Figure ). The physisorption is repeatable at least over three cycles without changes although the narrow hysteresis is observed in the pressure range p/p0 = 0 -0.1, corresponding to the adsorption and desorption of the methane in the cuboctahedral pore but obviously without deteriorating the crystal structure.