Introduction of acetic acid

Acetic acid, the common name of acetic acid, are widespread in nature, and it is an organic compound, a hydrocarbon important oxygenated derivatives, is typical of organic acids. Acetic acid is considered sour and pungent smell of vinegar inside sources. In the family, dilute solution of acetic acid is often used in detergents. Food industry, in the list of food additives E260, the acetic acid is to provide an acidity regulator.

Acid molecule containing two carbon atoms and a saturated carboxylic acid, is an important oxygenated hydrocarbon derivatives. Functional group is a carboxyl group. Because the main component of vinegar, also known as acetic acid. For example, in fruit or vegetable oil esters mainly present in the form of its compounds; the animal tissue, faeces and blood in free acid form. Common vinegar contains 3% to 5% acetic acid. Acetic acid is a colorless liquid with a strong pungent odor. Mp 16 .6 ℃, boiling point 117 .9 ℃, relative density of 1.0492 (20/4 ℃) than water density, refractive index 1.3716. 16.6 ℃ less pure acetic acid into ice-like solid when, so often referred to acetic acid. Soluble in water, ethanol, ether and carbon tetrachloride. When water is added to acetic acid, the total volume of the mixture becomes smaller, the density increased until the molecular ratio of 1:1, to form a monobasic acid is equivalent to the original acid CH3C (OH) 3, further diluted, the volume does not change. Pure anhydrous acetic acid (acetic acid) is a colorless, hygroscopic liquid with a freezing point of 16.6 ° C (62 ° F), after solidification as colorless crystals.

Although according to the acetic acid in water dissociation ability which is a weak acid, but acetic acid is a corrosive, the vapor eye and nose irritation effect. Acetic acid is a simple carboxylic acid, is an important chemical reagent. Titanium is also used for the manufacture of film are needed and wood cellulose acetate adhesive in polyvinylacetate, as well as many synthetic fibers and fabrics.

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