Acetic acid, also called acetic acid, glacial acetic acid, chemical CH3COOH, is an organic monovic acid, which is the main component of vinegar. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic solid, a solidified point of 16.6 ° C (62 ° F), solidified is a colorless crystal, weakly acidic in aqueous solution, strong corrosive, steam to eye and nasal stimulation Sexual effect.

Acetic acid is widely distributed in nature, such as in the fruits or enforcement oil, may be present in the manner of ester. In the tissue of animals, excrement and blood in the form of free acids. Many microorganisms can be converted to acetic acid through fermentation.

Acetic acid is the main component of vinegar, and vinegar runs almost through the history of the entire human civilization. Fermentation bacteria (acetate acetate) can be found in every corner of the world. Each nation is sometimes scored in wine, and it will find vinegar - it is the natural product of these alcoholic beverages exposed to the air. For example, my country has the statement of Dukang son's black tower because of brewing time.

People in the ancient Rome put the sour wine boiled in the lead container, which can get a high sweet syrup called "SAPA". "SAPA" is rich in a sweet lead sugar, typically acetate. At the 8th century, the Persian Alchemist Jia Bill was concentrated with acetic acid in vinegar with distillation.

During the Renaissance Period, acetic acid was prepared by a metal acetate. The 16th century German alchemist Andreas Libfuss compared the acids of ice acetic acid from this approach and acid extracted from vinegar. Because of the presence of water, the nature of the acetic acid has changed greatly, so that in centuries, chemists do this is a substance of two alarm. Until French chemist Adi (Pierre ADET) proved that the main components of these two substances were the same.

In 1847, German scientist Adolf William Herman Colebei synthesized acetic acid in the first inoperable material. The response process is as follows: First, the carbon sulfide is converted to carbon tetrachloride, followed by high temperature decomposition of tetrachlorethylene, hydrolyzed and chlorinated, resulting in trichloroacetic acid, and finally acetic acid is evaporated.

In 1910, most of the ice acetic acid extracts the coal tar obtained from dry-discharged wood. The process first is treated with calcium hydroxide, and then calcium calcium composed of sulfuric acid is then acidified to give acetic acid therebetween. In 1911, the world's first set of acetal oxidation synthesis acetic acid in Germany was established, which was subsequently developed by low alkane oxidation.