Ruling 193
Wine made from impure grapes and suchlike, or wine that has come into contact with some other impurity, does not become pure by turning into vinegar.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)
Purity: Ruling on Wine Made from Impure Substances or Contacting Impurity
Practical Laws of Islam as per the teachings of Ayatullah Sistani
