The possibility for small non-polar molecules to diffuse through HCN is unlikely to be limited to the hydrocarbons studied herein. Partial intercalation of N2 -an important component of the Titan liquid cycle -is a likely scenario, but one challenging to prove due to its small size and even weaker interactions. HCN-lattice intercalation of other more reactive molecules may be an important mechanism for facilitating chemical reactivity under frigid conditions and will be the subject of future study.