Glacial Acetic acid, H C2 H3 O2 is pretty much the chemical formula for vinegar although the vinegars obviously have a dilution from the full concentrated formula of Glacial Acetic acid.

I can see where this would be a good method to increase the acidity to the point you want it to be. Some white vinegars for sale in the market are simply chemical in that they are not created from any fruit at all, but just diluted Acetic acid. They sure wash windows well, but lack a bit in the depth of taste. A bit like pure Ethyl alcohol. It will get you pretty drunk, but not in the style of a delightful fermented beverage.