Here, sulphur maybe converted into pentathionic acid ([H.sub.2][S.sub.5][O.sub.6]), which could explain the antibacterial and antifungal properties of sulphurous mineral waters .
(2) Sulphur may also interact with oxygen radicals in the deeper layers of the epidermis and may in turn be transformed into pentathionic acid or produce [H.sub.2]S.
Young, "Pentathionic acid, the fungicidal factor of sulphur," Science, vol.
Sulfur may also interact with oxygen radicals, producing sulfur and disulfur hydrogen, which may be transformed into pentathionic
acid (H2S5O6) and this may be the source of the antibacterial and antifungal activity of sulfur water.