White wine vinegar is made from fermented white wine, which contains alcohol. In Islamic law, products containing alcohol are generally considered haram (forbidden). However, during the fermentation process, the alcohol in the vinegar typically converts to acetic acid, which is not intoxicating. Many scholars consider pure vinegar, with no trace of alcohol, to be halal (permissible), especially after complete fermentation. Nevertheless, opinions vary among scholars. Some may advise avoiding vinegar derived from wine altogether, while others permit it if it is thoroughly fermented and alcohol-free. To be cautious, it's best for Muslims to verify that the vinegar is made without alcohol or from permissible sources.