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hydrogen sulfide (H2S)
[HY-druh-jihn SUHL-fyd]

Hydrogen sulfide is the result of yeast combining with various forms of SULFUR. It produces an undesirable, rotten-egg smell in wine. Eventually, H2S in wine transforms into MERCAPTANS (a skunky odor) and disulfides (a sewage smell), both of which ruin a wine.
Related Links: mercaptans, sulfur dioxide (SO2), mercaptans
© Copyright Barron's Educational Services, Inc.
1995 based on THE WINE LOVER'S COMPANION,
by Ron Herbst and Sharon Tyler Herbst.

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