The C—H⃛O hydrogen bond in (di­cyano­methyl)­ammonium p‐toluene­sulfonate

In the title compound, C₃H₄N₃⁺·C₇H₇O₃S^?, the activated C—H group of the cation forms a short but bent C—H?O hydrogen bond with a sulfonate O atom of the anion; C?O = 3.075 (5) Å and C—H?O = 130°.