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Vapor pressure measurements revealed that the ionic liquid can store up to 3.66\u00a0equivalents of SO\n                    <jats:sub>2<\/jats:sub>\n                    at room temperature, which can be released in a controlled manner upon heating or depressurization. The physicochemical properties were investigated, and long\u2010term stability was demonstrated, as no decomposition was observed for more than six months. Based on its solid\u2010state structure, the bonding analysis indicated a covalent sulfur\u2010chlorine interaction, which is consistent with conducted Raman studies and quantum chemical calculations. Atom economy and cost estimates are compared with those of commonly used SO\n                    <jats:sub>2<\/jats:sub>\n                    surrogates, highlighting the developed transfer reagent as an inexpensive and (atom\u2010)economic alternative for laboratory\u2010scale applications. The synthetic utility of [NEt\n                    <jats:sub>3<\/jats:sub>\n                    Me][Cl(SO\n                    <jats:sub>2<\/jats:sub>\n                    )\n                    <jats:italic>\n                      <jats:sub>n<\/jats:sub>\n                    <\/jats:italic>\n                    ] is further demonstrated, enabling the synthesis of valuable organosulfur compounds such as 3\u2010sulfolenes, sulfonamides, sulfones, and sulfonyl fluorides in good to excellent yields. 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