Synthetic vinegar , also known as triacetin , with an edible ice acetic dilute acid formed. Its vinegar smell is great, but no fragrance. Glacial acetic acid has a certain corrosive effect on the human body. It should be diluted when used. Generally, the content of glacial acetic acid should not exceed 3-4%. This vinegar does not contain all the nutrients in vinegar, so it is not easy to mold and deteriorate; but because it has no nutritional effect, it can only be seasoned, so if there is no special need, it is better to eat vinegar.