Dr. Aude Watrelot, Jennie Savits, & Maureen Moroney | 2020
Volatile sulfur compounds (VSCs) are a class of sulfur containing compounds that are often described as reductive or reduced. The most common of these faults is hydrogen sulfide (H2S), which smells like rotten eggs or sewer gas. Like many other compounds causing wine faults, H2S in trace amounts can add to the wine. When the concentration reaches or exceeds the sensory threshold, the odor can become a problem.