The preservability of the present HS-I hydrates were evaluated by powder X-ray diffraction measurements. The temperature profiles of PXRD pattern (see Fig. in Supporting Information) for N4446Cl + CH4 or CO2 hydrate under vacuum conditions did not change from 93 to 268 K for CO2 and to 258 K for CH4, which indicated that the N4446Cl + gas hydrates can be preserved over 258 K. This suggests that the N4446Cl hydrates can keep holding gases up to near the freezing point of ice which is widely available in the existing cold chain, therefore, this material is readily utilized for the purposes of gas storage and transportation.