Purity: Ruling on Wine Made from Impure Substances or Contacting Impurity

Practical Laws of Islam as per the teachings of Ayatullah Sistani

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)