I am not sure if spirit vinegar is halal. I have asked at different mosque and called on Islamic TV shows but each of them have a different view. There is a hadith which mentions that the Prophets favorite was vinegar. However there is also another hadith which say that a person asked the Prophet if it is permissible to make vinegar from alcohol and he said no. He had said that no amount of alcohol should be used to make something else by purpose but otherwise it is permissible to consume. Nowadays spirit vinegar is made from alcohol by purpose. And I was wondering maybe the vinegar that the Prophet liked was different to the vinegar today.