White vinegar is primarily made up of acetic acid (CH3COOH), which is a weak organic acid. It typically contains 4-5% acetic acid by volume, although the concentration can vary depending on the brand and type of vinegar.

Besides acetic acid, white vinegar also contains:

* Water: The majority of white vinegar is water.

* Trace minerals: These can vary depending on the source of the vinegar.

While the exact composition might differ slightly, the main components are always acetic acid and water, giving it the characteristic sour taste and pungent aroma.