Table 2.

Properties of sulphur dioxide.

Properties	Advantages	Disadvantages	References
Antioxidant	Antioxidase activity, reduce quinones formation, reaction with hydrogen peroxide	Effectiveness depends on pH	[11,145,146]
Antimicrobial	Prevents unintentional fermentations, prevents formation of off-flavours	Effectiveness depend on pH	[[147], [148], [149], [150], [151], [152]]
Dissolving	Favourite extraction of phenolic compounds	No significant colour improvement	[145]
Sensory	Wines treated with SO2 exhibit a more intricate flavour profile, particularly evident in instances involving overripe or subpar grape varieties	An excessive use of SO2 cause formation of mercaptans and hydrogen sulphide	[145,153]
Health		Allergic reactions in some people	[[135], [136], [137], [138], [139], [140], [141], [142], [143]]