Acetic+acid

Acetic Acid is an organic compound with the chemical formula CH3CO2H (also written as CH3COOH). It is a colorless liquid that when undiluted is also called //glacial acetic acid,// which means its water __free__//.// The freezing point of acetic acid is 62 F, it becomes colorless crystals after solidification. Acetic acid is the main component of vinegar (apart from water), and has a distinctive sour taste and pungent smell. Even though Acetic is categorized as a "weak acid", it can still be corrosive to __skin__ in concentrated forms. It is widely used as a chemical reagent for production of cellulose acetate and polyvinyl acetate, which are used for production of other goods. The solution of acetic acid is also used as disincrustants at home. This acid is very hazardous to humans if it comes in contact with skin or clothing and can burn someone very badly. [acetic acid is used as a non brewed condiment to preserve pickles]

Pure acetic acid was first isolated about 1700 by the distillation of vinegar. When pure, acetic acid is a clear, colorless liquid with a sharp, irritating odor of vinegar. In poorly heated laboratories, the acid was oftentimes found frozen inside its container because its freezing point is only slightly below room temperature at 16.7EC. The term glacial (ice-like) came to be applied to the pure acid in either its solid or liquid state. Glacial acetic acid boils at 118EC, and has a density of 1.049 g/mL at 25EC. It is flammable with a flash point of 39EC. Through hydrogen- bonding interactions, acetic acid is miscible (mixable) in all proportions with water, ethyl alcohol, and diethyl ether. Pure or concentrated solutions of acetic acid are very corrosive and can cause painful burns. Acetic Acid Otic Solution, USP is a solution of acetic acid (2%), in a propylene glycol vehicle containing propylene glycol diacetate (3%), benzethonium chloride (0.02%), sodium acetate (0.015%), and citric acid. The empirical formula for acetic acid is CH3COOH, with a molecular weight of 60.05. The structural formula is: Acetic Acid Otic Solution is available as a nonaqueous otic solution buffered at pH 3 for use in the external ear canal. Acetic acid is a common chemical found in all living organisms. Many people are familiar with with acetic acid in its diluted form--vinegar. Pesticide products containing acetic acid are used in controlling a diverse group of weeds, including some grasses. There are no risks to the public or the environment when the active ingredient is used according to the label. However, applicators are required to use protective equipment to prevent contact with skin and eyes. Acetic acid is found in all living organisms. It is readily broken down to carbon dioxide and water. Vinegar consists of approximately 5% acetic acid and 95% water. This is also the concentration of acetic acid when applied as a pesticide product. To be effective, acetic acid needs to contact the plant leaves; the acidity of the spray solution damages and dries out the leaves.

Acetic Acid Otic Solution, USP is a solution of Acetic Acid (2%), in a propylene glycol vehicle containing propylene glycol diacetate (3%), benzethonium chloride (0.02%), sodium acetate (0.015%), and citric acid. The empirical formula for Acetic Acid is CH 3 COOH, with a molecular weight of 60.05. Acetic Acid is antibacterial and antifungal; propylene glycol is hydrophilic and provides a low surface tension; benzethonium chloride is a surface active agent that promotes contact of the solution with tissues. Acetic acid combinations are used to treat certain problems of the ear canal. They also help relieve the redness, itching, and swelling that may accompany these conditions.

Acetic acid is an important industrial chemical. About 3.2 × 109 kilograms of acetic acid were produced in the United States in 1999. The primary use of this chemical is in the manufacture of assorted acetate esters. These are substances formed by reacting acetic acid with a substance containing a hydroxyl (–OH) group. Cellulose, found in cotton and wood, is a polymeric material containing multiple hydroxyl groups. It reacts with acetic acid to yield cellulose acetate, which is used to make films and textiles. Some photographic films are made of cellulose acetate, and rayon is made from cellulose acetate fibers. Vinyl acetate, another ester of acetic acid, polymerizes to form poly(vinyl acetate), which is used in water-based latex paints and in glues for paper and wood.

Acetic acid is the chemical compound responsible for the characteristic odor and sour taste of vinegar. Typically, vinegar is about 4 to 8% acetic acid. As the defining ingredient of vinegar, acetic acid has been produced and used by humans since before the dawn of recorded history. In fact, its name comes from the Latin for vinegar, //acetum//. Vinegar is formed from dilute solutions of alcohol, such as wine, by the action of certain bacteria in the presence of oxygen. These bacteria require oxygen, and the overall chemical change is the reaction of ethanol with oxygen to form acetic acid and water.

Acid Acetic as a solvent
Acid acetic is a polar solvent, similar to water. With a moderate static permittivity of 6.2, it dissolves not only polar compounds such as inorganic salts and sugar, but also non-polar compounds such as oils and element such as sulfur and iodine.This dissolving property of acetic acid makes it a widely used industrial chemical. this chemical is very acidy. It is also corrosive and should be handled with care.

Vinegar ( Solution of acetic acid and water)
Vinegar is typically 4-18% acetic acid by mass. Vinegar is used directly as a condiment and in the pickling of vegetables and other foods. Table vinegar tends to be more diluted (4% to 8% acetic acid), while commercial food pickling, in general, employs solutions that are more concentrated. The amount of acetic acid used as vinegar on a worldwide scale is not large, but is by far the oldest and best-known __application__.