Synthetic vinegar, also called vinegar essence, is diluted with edible glacial acetic acid. It has a strong vinegar smell but no fragrance. Glacial acetic acid has a certain corrosive effect on the human body and should be diluted when used. Generally, the content of glacial acetic acid cannot exceed 3-4%. This kind of vinegar does not contain various nutrients found in vinegar, so it is not prone to mold and deterioration; however, it has no nutritional effect and can only be used as a seasoning. Therefore, if there is no special need, it is better to eat vinegar.

The scientific name is glacial acetic acid, which is the residue after alcohol evaporates. It is highly corrosive. Generally, the concentration of acetic acid in vinegar is less than 7%, but when blended with vinegar essence, it can reach more than 45%. It can cause oral and esophageal burns. .And it is harmful to human body. It is best not to eat it.