{[Eth­yl(pyridin-4-ylmeth­yl)carbamo­thio­yl]sulfanido-κ(2) S,S′}(1,4,7,10,13,16-hexa­oxa­cyclo­octa­decane-κ(6) O)potassium

The asymmetric unit of title salt co-crystal, [K(C(9)H(11)N(2)S(2))(C(12)H(24)O(6))], comprises a K(+) cation, an (−)S(2)CN(Et)py anion and a 18-crown-6 mol­ecule. Substantial delocalization of π-electron density is evident in the di­thio­carbamate anion, as indicated by the equivalent C—S bond lengths. The K(+) cation sits within an O(6)S(2) donor set lying 0.7506 (6) Å out of the least-squares plane through the six O atoms (r.m.s. deviation = 0.1766 Å) of the 18-crown-6 mol­ecule with the two S atoms being on one side of this plane. Supra­molecular layers in the bc plane, sustained by C—H⋯O and C—H⋯π inter­actions, feature in the crystal packing.