Acetic acid systematically named ethanoic acid is an organic compound with the chemical formula CH3COOH (also written as CH3CO2H or C2H4O2).
It is a colourless liquid that when undiluted is also called glacial acetic acid. Vinegar is roughly 3 %-9 % acetic acid by volume, making acetic acid the main component of vinegar apart from water.
Acetic acid has a distinctive sour taste and pungent smell. Besides its production as household vinegar, it is mainly produced as a precursor to polyvinylacetate andcellulose acetate. Although it is classified as a weak acid, concentrated acetic acid is corrosive and can attack the skin.
Acetic acid is the second simplest carboxylic acid (after formic acid) and is an important chemical reagent and industrial chemical, mainly used in the production of cellulose acetate for photographic film and polyvinyl acetate for wood glue, as well as synthetic fibers and fabrics.
Properties |
|---|
Molecular formula |
C2H4O2 |
| Molar mass | 60.05 g·mol1 |
| Appearance | Colourless liquid |
| Odor | Pungent/Vinegar-like |
| Density | 1.049 g cm3 |
| Melting point | 16 to 17 °C; 61 to 62 °F; 289 to 290 K |
| Boiling point | 118 to 119 °C; 244 to 246 °F; 391 to 392 K |
Solubility in water |
Miscible |
| log P | -0.322 |
| Acidity (pKa) | 4.76 |
| Basicity (pKb) | 9.198 (basicity of acetate ion) |
Refractive index(nD) |
1.371 |
| Viscosity | 1.22 mPa s |
| Dipole moment | 1.74 D |
| Thermochemistry |
|---|
Specific
heat capacity (C) |
123.1 J K1 mol1 |
Std molar
entropy (So298) |
158.0 J K1 mol1 |
Std enthalpy of
formation(ΔfHo298) |
-483.88--483.16 kJ mol1 |
Std enthalpy of
combustion(ΔcHo298) |
-875.50--874.82 kJ mol |
Specification:-
Index |
Specification |
GB/T1682-2008 Best-grade |
Appearance |
Clear liquid, without suspending impurities |
Chromaticity(in Hazen)(Pt-Co),≤ |
10 |
Acetic acid content,%≥ |
99-99.5 |
Moisture,%≤ |
0.15 |
Formic acid content,%≤ |
0.06 |
Aldehyde content, %≤ |
0.03 |
Vaporized residue,%≤ |
0.01 |
Iron content (based on Fe), %≤ |
0.00004 |
Reduction time of potassium permanganate, min≥ |
30 |
Application:-
Acetic acid is a chemical reagent for the production of chemical compounds. The largest single use of acetic acid is in the production of vinyl acetate monomer, closely followed by ester production. The volume of acetic acid used in vinegar is comparatively small.
The major use of acetic acid is for the production of vinyl acetate monomer (VAM). Vinyl acetate can be polymerized to polyvinyl acetate or to other polymers, which are components in paints and adhesives.
The major esters of acetic acid are commonly used solvents for inks, paints and coatings. The esters include ethyl acetate, n-butyl acetate, isobutyl acetate, and propyl acetate.
Glacial acetic acid is an excellent polar protic solvent, as noted above. It is frequently used as a solvent for recrystallization to purify organic compounds. Acetic acid is used as asolvent in the production of terephthalic acid (TPA), the raw material for polyethylene terephthalate (PET).
We established in 2004, is located in jinzhou city, hebei province. We joinville is one of the largest chemical industry base of hebei, Our annual sales, can achieve 200 million yuan.
We are a professional chemicals manufacturer, our products are divided into three categories, agricultural fertilizer, leather chemicals, washing chemicals. We produce ammonium sulfate 200000 tons a year in the field of agricultural fertilizer, 50000 tons a year in the field of leather chemicals we produce formic acid, glacial acetic acid, 50000 tons, 30000 tons of sodium formate. We produced every year in the field of XiDiPin sodium tripolyphosphate, 30000 tons, 20000 tons of SLES, LABSA10000 tons.
Now our main markets in Asia and Europe, to the future we will set up sales network in more than 200 countries around the world.
Honesty is our principle in business, the product quality is fundamental to our survival, we want all our customers, have a chance to visit our factory, we will establish a solid and reliable cooperation relationship!
