Acetic acid

Chemical data page This page provides supplementary chemical data on Material Safety Data Sheet [ ] The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet ( • • Structure and properties [ ] Structure and properties n D 1.3716 r 6.15 ε 0 at 20°C ? ? ? ? 26.6 dyn/cm at 30°C 1.222 mPa·s at 20°C 1.0396 mPa·s at 30°C 0.7956 mPa·s at 50°C 0.4244 mPa·s at 110°C Thermodynamic properties [ ] Phase behavior 289.8 K (16.7°C),? Pa 593 K (320°C), 57.8 bar –26.7°C of fusionΔ fus H o +11.7 kJ/mol of fusionΔ fus S o 40.5 J/(mol·K) of vaporizationΔ vap H o +23.7 kJ/mol of vaporizationΔ vap S o ? J/(mol·K) Solid properties of formation Δ f H o solid ? kJ/mol S o solid ? J/(mol K) c p ? J/(mol K) Liquid properties of formation Δ f H o liquid −483.5 kJ/mol S o liquid 158.0 J/(mol K) c H o –876.1 kJ/mol c p 123.1 J/(mol K) Gas properties of formation Δ f H o gas –438.1 kJ/mol S o gas 282.84 J/(mol K) c p 63.4 J/(mol K) a = 1782.3 L 2 kPa/mol 2 b = 0.1068 liter per mole Vapor pressure of liquid [ ] P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600 T in °C –17.2 17.5 43.0 63.0 99.0 118.1 143.5 180.3 214.0 252.0 297.0 — Table data obtained from CRC Handbook of Chemistry and Physics 44th ed. P m m H g = 10 7.80307 − 1651.2 225 + T for T = 36 to 170°C Formula from Lange's Handbook of Chemistry, 10th ed. 10 of acetic acid vapor pressure vs. temperature. Uses formula: log 10 ⁡ P m m H g = 7.80307 − 1651.2 2...

Key Points/Overview One of the most common ways consumers may come into contact with acetic acid is in the form of household vinegar, which generally contains about 5 percent acetic acid and 95 percent water. When acetic acid is at 99.5 percent concentration, it is referred to a glacial acetic acid, which can be used as raw material and solvent in the production of other chemical products. Industrial applications of glacial acetic acid include producing vinyl acetate, as solvent to dissolve oils, sulfur and iodine; acidizing oil and gas; manufacturing pharmaceuticals and vitamins, and food processing. Occupational exposure to glacial acetic acid can occur through inhalation and skin or eye contact. OSHA has set standards for exposure to acetic acid. Uses & Benefits One of the most common ways consumers may come into contact with acetic acid is in the form of household vinegar, which is naturally made from fermentable sources such as wine, potatoes, apples, grapes, berries and grains. Vinegar is a clear solution generally containing about 5 percent acetic acid and 95 percent water. Vinegar is used as a food ingredient and can also be an ingredient in • Food Preparation: Vinegar is a common food ingredient, often used as a brine in pickling liquids, vinaigrettes, marinades and other salad dressings. Vinegar also • Cleaning: Vinegar can be used throughout the home as a window cleaner, to clean automatic coffee makers and dishes, as a rinsing agent for dishwashers, and to clea...

Acetic Acid (CH3COOH) What is Acetic Acid? Acetic acid is an organic compound with the formula CH 3COOH. It is a carboxylic acid consisting of a methyl group that is attached to a carboxyl functional group. The systematic IUPAC name of acetic acid is ethanoic acid and its 2H 4O 2. Vinegar is a solution of acetic acid in water and contains between 5% to 20% ethanoic acid by volume. The pungent smell and the sour taste is characteristic of the acetic acid present in it. An undiluted solution of acetic acid is commonly referred to as glacial acetic acid. It forms crystals which appear like ice at temperatures below 16.6 oC. It has a wide range of applications as a polar, protic solvent. In the field of analytical chemistry, glacial acetic acid is widely used in order to estimate substances that are weakly alkaline. Table of Content • • • • • • • • • Structure of Acetic acid- CH 3COOH • It can be observed in the solid-state of acetic acid that there is a chain of molecules wherein individual molecules are connected to each other via hydrogen bonds. • Dimers of ethanoic acid in its vapour phase can be found at temperatures approximating to 120 o • Even in the liquid phase of ethanoic acid, its dimers can be found when it is present in a dilute solution. These dimers are adversely affected by solvents that promote • The structure of acetic acid is given by CH 3(C=O)OH, or CH 3CO 2H The structure of acetic acid is illustrated below. Structurally, ethanoic acid is the second sim...