In the first part of this review history, synthetic methods, and reactions were reported. Now molecular structure, conformation, spectroscopy, electrochemistry, flavor research and technical applications are presented. The preference of a number of 1,2,4,5-tetrathianes for the twist conformation resulted in a large number of publications in the field of conformation research. A growing interest is shown in the part played by tetrathianes as ingredients of natural and artifical aromas. Tables contain structural formulas, principles of synthesis, yields, spectra, information concerning physicochemical properties and a bibliography for all known species. Based upon a CAS substructure search research results of the period from 1887 up to mid-1989 have been evaluated.