A:
If
Khamr (intoxicant) is turned into vinegar, it remains Haram (prohibited) and turning it into another substance does not change its ruling. It was related by Muslim
in his Sahih (authentic) Book of Hadith
on the authority of
Anas (may Allah be pleased with him) that he said:
"The Prophet (peace be upon him) was asked about (the use of) Khamr from which vinegar is prepared. He said: 'No (it is prohibited).'"
However, if Khamr is naturally acetified without human interference, it will be Tahir (pure) and permissible to use. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.