Ethanol

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What Is Ethanol?

Ethanol is a clear, colorless liquid with a distinct odor and a burning taste that mixes easily with water. It’s prepared by carbohydrate fermentation and acts as a central nervous system (CNS) depressant, a diuretic, and a disinfectant.

Ethanol can be found in emissions from plants, fires, volcanoes, animal wastes, and insects, and is a product of natural sugar fermentation. It’s also an important component of alcoholic beverages, many of which contain up to 50 percent ethanol.

Intoxication resulting from the ingestion of alcoholic beverages is generally attributed to ethanol content. Effects include loss of coordination and inhibition, impaired judgment, blurred vision, slurred speech, dizziness, mood changes, drowsiness, headache, increased heart rate, and nausea and vomiting.

Ingesting large amounts of ethanol can lead to unconsciousness and death. Long-term alcohol abuse is associated with liver disease and an increased risk of stroke, heart disease, and obesity. Excessive long-term use can lead to various cancers. Fetal alcohol syndrome in infants can also result when alcohol is consumed in large amounts during pregnancy.

Alcohol ultimately injures cells by dehydrating and precipitating cytoplasm or protoplasm which produces its bactericidal and antifungal properties. It binds to GABA, glycine, and NMDA receptors and modulates their effects. It’s also metabolized by the enzyme alcohol dehydrogenase.

Ethanol has not been specifically evaluated, but sufficient evidence exists to treat alcoholic beverage consumption as a human carcinogen.

Synonyms: Ethyl alcohol, absolute alcohol, methyl carbinol, grain alcohol

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Physical and Chemical Properties

PropertyValue  

Property

Molecular Weight
Value
46.069 g/mol
 
 
 
 

Property

Density
Value
0.7893 g/mL at 20ºC
 
 
 
 

Property

Boiling Point
Value
78.2ºC
 
 
 
 

Property

Melting Point
Value
-114.1ºC
 
 
 
 

Property

Flash Point
Value
14.0ºC
 
 
 
 

Property

Viscosity
Value
1.074 mPa·s at 25ºC
 
 
 
 

Property

Dielectric Constant
Value
24.3 at 25ºC
 
 
 
 

Property

Dipole Moment
Value
1.66 D at 20ºC
 
 
 
 

Property

UV Cutoff
Value
205 nm
 
 
 
 

Property

Refractive Index
Value
1.3611 at 20ºC
 
 
 
 

Property

Vapor Pressure
Value
59.27 mm Hg
 
 
 
 

Property

Water Solubility
Value
Miscible
 
 
 
 

Property

Heat of Combustion
Value
1336.8 x 106 J/kg at 25ºC
 
 
 
 

Property

Heat of Vaporization
Value
42.32 x 104 J/kg at 80ºC
 
 
 
 

Property

Dissociation Constant
Value
15.9 pKa at 25ºC
 
 
 
 

Property

Surface Tension
Value
21.97 mN/m at 25ºC
 
 
 
 

Uses

Ethanol is used as a solvent, fuel additive, and in the production of pharmaceuticals, perfumes, cosmetics, and other chemicals. It is also an ingredient in consumer products like cleaners, sprays, inks, mouthwash, and aftershave.


Designations and Grades

PropertyValue  

Property

CAS Number
Value
64-17-5
 
 
 
 

Property

MDL Number
Value
3568
 
 
 
 

Property

RIDAD/UN Number
Value
UN 1170
 
 
 
 

Property

Beilstein Registry
Value
1718733
 
 
 
 

Property

EG/EC Number
Value
200-578-6
 
 
 
 

Property

NSC Number
Value
85228
 
 
 
 

Property

ICSC Number
Value
0044
 
 
 
 

Property

RTECS Number
Value
KQ6300000
 
 
 
 

Grades

ACS/ACS Reagent/Certified ACS

Biochemical

Histological

HPLC

Laboratory/Technical

NF/USP

Sequencing

Spectrophotometry

 

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