Ethanolamine
| Names | |
|---|---|
| IUPAC name
2-Aminoethan-1-ol
| |
| Other names
2-Amino-1-ethanol
2-Aminoethanol 2-Hydroxyethylamine Colamine Ethylolamine Glycinol MEA Monoethanolamine Olamine β-Aminoethanol β-Aminoethyl alcohol β-Hydroxyethylamine | |
| Properties | |
| C2H7NO H2N-CH2-CH2-OH | |
| Molar mass | 61.08 g/mol |
| Appearance | Viscous colorless liquid |
| Odor | Ammonia-like |
| Density | 1.02700 g/cm3 (10 °C) 1.01643 g/cm3 (20 °C) 1.01067 g/cm3 (30 °C) 1.00277 g/cm3 (40 °C) 0.99480 g/cm3 (50 °C) 0.98675 g/cm3 (60 °C) 0.97862 g/cm3 (70 °C) 0.97040 g/cm3 (80 °C)[1][2] |
| Melting point | 10.3 °C (50.5 °F; 283.4 K) |
| Boiling point | 170 °C (338 °F; 443 K) |
| Miscible | |
| Solubility | Miscible with acetone, chloroform, ethanol, glycerin, isopropanol, methanol Immiscible with diethyl ether, heptane, hexane |
| Vapor pressure | 0.48 mmHg (20 °C) |
| Acidity (pKa) | 9.50 |
| Thermochemistry | |
| Hazards | |
| Safety data sheet | Sigma-Aldrich |
| Flash point | 85 °C (185 °F; 358 K) |
| Lethal dose or concentration (LD, LC): | |
| LD50 (Median dose)
|
1,720-3,320 mg/kg (rat, oral) 620 mg/kg (guinea pig, oral) 700-1,475 mg/kg (mouse, oral) 1,000 mg/kg (rabbit, oral) |
| Related compounds | |
| Related compounds
|
Diethanolamine Triethanolamine |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Ethanolamine or monoethanolamine is an organic chemical compound with the formula H2NCH2CH2OH. The molecule is both a primary amine and a primary alcohol, an amino alcohol.
Contents
Properties
Chemical
Ethanolamine reacts with carbon dioxide from air to form carbonate.
Physical
Ethanolamine is a viscous colorless liquid, with an ammoniacal odor, miscible with water and alcohols.
Ethanolamine forms azeotropes with various solvents, such as aniline, anisole, dibutyl ether, ethylbenzene, mesitylene, xylene, α-pinene, halobenzenes, halotoluenes, etc.[3]
Availability
Ethanolamine is sold by chemical suppliers.
Certain oven cleaners have monoethanolamine, as solution.
Preparation
Monoethanolamine is produced by reacting ethylene oxide with aqueous ammonia. The reaction also produces diethanolamine and triethanolamine. The ratio of the products can be controlled by changing the stoichiometry of the reactants.
Decarboxylation of serine will also yield ethanolamine.
Projects
- Make ethylenediamine
- Carbon dioxide scrubber
- Preparation of aziridine
Handling
Safety
Ethanolamine is mildly toxic if ingested. Inhalation and skin contact can cause severe irritation.
Ethanolamine is corrosive to some materials.
Storage
Ethanolamine should be kept in closed plastic or glass bottles.
Disposal
Should be mixed with a more flammable solvent and incinerated.
References
- ↑ Taib, Malyanah Mohd; Murugesan, Thanapalan; Journal of Chemical and Engineering Data; vol. 57; nb. 1; (2012); p. 120 - 126
- ↑ Taib, Malyanah Mohd; Akbar, Majid Majeed; Murugesan, Thanapalan; Journal of Molecular Liquids; vol. 190; (2014); p. 23 - 29,
- ↑ Horsley,L. H.; in Azeotropic Data (Advances in Chemistry Series Nr. 6) <Washington 1952> S. 69, 70
