3-[(Di­phenyl­phosphino­thio­yl)­oxy]-N-methyl­propan-1-aminium di­phenyl­phosphanyl­thio­ate

In the asymmetric unit of an ammonium phosphanyl­thio­ate salt, a cation-anion heterodimer is formed through an inter­molecular N-H...O hydrogen bond. Packing through N-H...O and N-H...S hydrogen bonds is responsible for the high melting point.