Acetic Acid Acetic acid, also known as acetic acid and glacial acetic acid, with chemical formula of CH3COOH, is an organic monobasic acid, which is the main component of vinegar. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic solid with a freezing point of 16.6(62) and colorless crystals after solidification. Its aqueous solution is weakly acidic and highly corrosive, and steam can irritate eyes and nose. 1) Glacial acetic acid is one of the most important organic raw materials, mainly used in vinyl acetate, acetic anhydride, cellulose acetate etc; 2) Glacial acetic acid is an important raw material for synthetic fibers, adhesives and dyes, etc; 3) Glacial acetic acid is also an excellent organic solvent, widely used in plastics, rubber, printing and other industries.