The prominent Muslim scholar, Sheikh Muhammad Iqbal Nadvi, Director and Imam of Al-Falah Islamic Center, Oakville, Ontario, Canada, states: “The ingredients of vinegar is halal to consume even if it says alcohol was used to make it since it transforms chemically into a different substance that is pure and therefore halal to use it.
However, if one mixes vinegar and alcohol to make salad or anything else. In this case, it is haram, not because the vinegar but because alcohol has been used to make it.”