Vinegar is a sour flavoring agent. According to different production methods, there are fermented vinegar and synthetic vinegar. Fermented vinegar is made of starch-containing multi-grain raw materials, sugar raw materials and edible alcohol through microbial fermentation. Synthetic vinegar is blended with glacial acetic acid as the main raw material. According to the different brewing technology, raw materials and flavor, vinegar can be divided into aged vinegar, fragrant vinegar, rice vinegar, smoked vinegar, special vinegar, sweet and sour vinegar, bran vinegar and wine vinegar.

White vinegar is a sour auxiliary material for cooking, with bright color and mellow sour taste. The main raw materials are water, rice, edible alcohol and edible salt. As a dietary seasoning, it is in great demand for nourishing and regulating human metabolism.