Acetic acid
Acetic acid, also known as acetic acid, glacial acetic acid, chemical formula CH3COOH, is an organic monobasic acid and short chain saturated fatty acids, for the vinegar sour taste and irritating smell of the source. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic solid with a freezing point of 16.7 ° C (62 ° F) and solidified to a colorless crystal. Although it is a weak acid based on the dissociation ability of acetic acid in aqueous solution, acetic acid is corrosive and its steam has an irritating effect on the eye and nose. Acetic acid is a simple carboxylic acid, composed of a methyl carboxyl group, is an important chemical reagents. In the chemical industry, it is used to make polyethylene terephthalate, which is the main part of the beverage bottle. Acetic acid is also used to make cinemabres needed for cellulose acetate and wood adhesives for polyvinyl acetate, as well as many synthetic fibers and fabrics. In the family, dilute acetic acid solution is often used as a descaling agent. In the food industry, in the food additive list E260, acetic acid is prescribed as an acidity regulator. The annual demand for acetic acid in the world around 6.5 million tons. Of which about 1.5 million tons is recycled, and the remaining 5 million tons is made directly through the petrochemical raw materials or through biological fermentation. ...