Chemical behind corked wine quashes other aromas

Old sock smell signals contamination but doesn't belong to TCA, study proposes

The musty stench emanating from a corked bottle of wine comes from a molecule that paradoxically dampens odors. Instead of smelling gross itself, this dreaded chemical, called TCA, unleashes its devastation by suppressing other smells, scientists propose September 16 in the Proceedings of the National Academy of Sciences.