Researchers identify the cause of rotten egg smell in canned wine

After conducting extensive tests, the team determined that the molecular form of sulphur dioxide (SO2) is the culprit.
Winemakers regularly use it as an antioxidant and antimicrobial, and it does not cause any issues when wine is stored in glass bottles.
However, SO2 interacts with the aluminium cans in different ways, and it can lead to the dreaded rotten egg smell.
Producers tend to use an ultra-thin coating inside the can to keep the wine and the aluminium apart, but it is often not enough to