Colorless, volatile and combustible gas (also hydrogen sulfide or sulfane), which is used, among other things, in decay processes of proteins
arises and therefore lazy eggs gives the characteristic smell. It also occurs in volcanic gases, natural gas and petroleum. In the wine the foul-smelling and very poisonous gas can be converted by conversion of sulphurous substances during the fermentation
arise. This is especially dangerous at the end of fermentation because the substance then remains in the wine. During the fermentation it becomes by the rinsing effect of the carbon dioxide
excreted. The cause can be a lack of nitrogen
and or vitamins
be in grape must. Certain yeasts in this case tend to sulfur dioxide
to convert to hydrogen sulphide. Also used for pest control in the vineyard sulfur-containing fungicides
can lead to it.