The acid contained in vinegar is acetic acid, the chemical formula is (CH)_3COOH.

The main component of vinegar is acetic acid, also called glacial acetic acid. In addition, it also contains rich organic acids, such as: lactic acid, gluconic acid, succinic acid, amino acids, etc. Acid contained in vinegar: Vinegar is a 3%-5% (mass fraction) aqueous solution of acetic acid. In addition to acetic acid, it generally contains some other trace substances. Specific substances are potassium, calcium, sodium, ferrous salts of acetic acid, amino acids, lactic acid (2-hydroxypropionic acid, etc.).

The vinegar contains acetic acid, which is an organic monovalent acid and is the main component of vinegar. There are mainly "rice vinegar", "smoked vinegar", "special vinegar", "sweet vinegar", "wine vinegar", "wine vinegar", "wine vinegar", and so on. "Wine vinegar", "white vinegar" and so on, the content is different according to the different varieties of origin.