Q 6: Fermentation of alcohol produces vinegar, for sugar is first converted into alcohol and then the alcohol is turned into vinegar. Is there any impediment to using vinegar?
(Part No. 22; Page No. 108
If the reality is as you mentioned, it is not permissible to use vinegar.
Anas (may Allah be pleased with him) narrated:
"The Prophet (peace be upon him) was asked about (the use of) Khamr (intoxicant) from which vinegar is prepared. He said: 'No (it is prohibited).'"
by Ahmad, Muslim, Abu Dawud, and Al-Tirmidhy who ranked it as Sahih (authentic))
Anas narrated that
Abu Talhah once asked the Prophet (peace be upon him) about some orphans who had inherited Khamr.
"The Prophet (peace be upon him) said, 'Spill it.' He said: 'Should not we transform it into vinegar?' The Prophet (peace be upon him) said, 'No.'"
by Ahmad and Abu Dawud)
The fact that the Prophet (peace be upon him) has forbidden
the acetification of Khamr proves that it is not permissible and does not deem Khamr as Tahir (pure) or lawful.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.