Crystal structure and Hirshfeld surface analysis of ketorolac tromethamine.

Ketorolac tromethamine or 1,3-dihy-droxy-2-(hy-droxy-meth-yl)propan-2-am-inium 5-benzoyl-2,3-di-hydro-1H-pyrrolizine-1-carboxyl-ate, C(15)H(12)NO(3) (+)·C(4)H(12)NO(3) (-), was studied by single-crystal and powder X-ray diffraction methods. One cation and one anion are present in the asymmetric unit. In the crystal, N-H⋯O and O-H⋯O hy-dro-gen bonds link the cation and anion. All the hy-dro-gen-bond inter-actions result in the formation of a di-periodic layer in the (100) crystallographic plane.