Product Description of Acetic Acid CAS# 64-19-7
Acetic acid, also known as AcOH, is named after the main component of vinegar and is one of the most important fatty acids. It naturally occurs in many plants either in free form or as esters. Its molecular formula is CH3COOH.
Vinegar has been brewed and used for thousands of years, with historical records of vinegar production in ancient China. Concentrated acetic acid was first successfully developed by Stahl in 1700.
Pure acetic acid is a colorless liquid with a pungent taste, with a melting point of 16.6°C, boiling point of 117.9°C, and relative density of 1.049 (20/4°C). It is soluble in water, ethanol, glycerol, ether, and carbon tetrachloride, but insoluble in carbon disulfide. Anhydrous acetic acid solidifies into ice at low temperatures, commonly referred to as glacial acetic acid.
It is corrosive and a weak organic acid, exhibiting the general properties of acids and capable of undergoing esterification reactions with alcohols.
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Acetic acid Chemical Properties
Melting point | 16.2 °C(lit.) |
Boiling point | 117-118 °C(lit.) |
density | 1.049 g/mL at 25 °C(lit.) |
vapor density | 2.07 (vs air) |
vapor pressure | 11.4 mm Hg ( 20 °C) |
refractive index | n20/D 1.371(lit.) |
FEMA | 2006 | ACETIC ACID |
Fp | 104 °F |
storage temp. | Store below +30°C. |
solubility | alcohol: miscible(lit.) |
form | Solution |
pka | 4.74(at 25℃) |
Specific Gravity | 1.0492 (20℃) |
color | colorless |
Odor | Strong, pungent, vinegar-like odor detectable at 0.2 to 1.0 ppm |
PH | 3.91(1 mM solution);3.39(10 mM solution);2.88(100 mM solution); |
PH Range | 2.4 (1.0M solution) |
Odor Threshold | 0.006ppm |
Odor Type | acidic |
explosive limit | 4-19.9%(V) |
Water Solubility | miscible |
λmax | λ: 260 nm Amax: 0.05 |
λ: 270 nm Amax: 0.02 |
λ: 300 nm Amax: 0.01 |
λ: 500 nm Amax: 0.01 |
Merck | 14,55 |
JECFA Number | 81 |
BRN | 506007 |
Henry's Law Constant | 133, 122, 6.88, and 1.27 at pH values of 2.13, 3.52, 5.68, and 7.14, respectively (25 °C, Hakuta et al., 1977) |
Dielectric constant | 4.1（2℃） |
Exposure limits | TLV-TWA 10 ppm ～25 mg/m3) (ACGIH, OSHA, and MSHA); TLV-STEL 15 ppm (37.5 mg/m3) (ACGIH). |
Stability: | Volatile |
LogP | -0.17 |
CAS DataBase Reference | 64-19-7(CAS DataBase Reference) |
NIST Chemistry Reference | Acetic acid(64-19-7) |
EPA Substance Registry System | Acetic acid (64-19-7) |
Safety Information
Hazard Codes | C,Xi |
Risk Statements | 34-42-35-10-36/38 |
Safety Statements | 26-36/37/39-45-23-24/25 |
RIDADR | UN 1792 8/PG 2 |
WGK Germany | 3 |
RTECS | NN1650000 |
F | 37113 |
Autoignition Temperature | 426 °C |
TSCA | Yes |
HazardClass | 8 |
PackingGroup | II |
HS Code | 29152100 |
Hazardous Substances Data | 64-19-7(Hazardous Substances Data) |
Toxicity | LD50 in rats (g/kg): 3.53 orally (Smyth) |
IDLA | 50 ppm |
![Industrial-grade acetic acid CAS#64-19-7]( "Industrial-grade acetic acid CAS#64-19-7")
Product Application of Acetic Acid CAS# 64-19-7
Acetic acid is a bulk chemical and one of the most important organic acids. It is primarily used in the production of vinyl acetate, acetic anhydride, acetate salts, and cellulose acetate. Polyvinyl acetate can be processed into films and adhesives, and serves as a raw material for the synthetic fiber vinylon. Cellulose acetate is widely used to manufacture rayon and motion picture film.
Acetic acid esters, formed from lower alcohols, are excellent solvents and are extensively applied in the paint industry. Acetic acid also acts as a solvent for oxidation reactions, such as the oxidation of p-xylene to terephthalic acid.
As an important raw material in organic synthesis, acetic acid is used to produce acetic anhydride, diethyl malonate, ethyl acetoacetate, halogenated acetic acids, and is involved in the manufacture of pharmaceuticals such as aspirin and pesticides like 2,4-D. It is also used to produce metal acetates, including manganese, sodium, lead, aluminum, zinc, and cobalt acetates, which serve as catalysts and additives in textile dyeing and leather tanning. For example: aluminum acetate acts as a mordant, disinfectant, and medical astringent; lead acetate is used for lead white paint; and lead tetraacetate is applied as an organic synthesis reagent. Acetic acid can also oxidize 1,2-diols to aldehydes or ketones, and sodium acetate and potassium acetate are commonly used as buffers in biochemistry.
In the food industry, acetic acid is used as an acidulant, flavor enhancer, and spice. When producing synthetic vinegar, acetic acid is diluted to 4–5% with water and combined with flavoring agents, resulting in a product similar in flavor to alcoholic vinegar, with a short production time and low cost.
Safety note: Acetic acid is highly corrosive, irritating the skin and capable of causing blisters. It is classified as a secondary organic corrosive substance.
![Industrial-grade acetic acid CAS#64-19-7]( "Industrial-grade acetic acid CAS#64-19-7")
