Monoethanolamine
Ethanolamine (2-aminoethanol, monoethanolamine, ETA, or MEA) is a naturally occurring organic chemical compound with the formula HOCH 2CH2NH2 or C2H7NO.[8] The molecule is bifunctional, containing both a primary amine and a primary alcohol. Ethanolamine is a colorless, viscous liquid with an odor reminiscent of ammonia.[9]
Ethanolamine is commonly called monoethanolamine or MEA in order to be distinguished from diethanolamine (DEA) and triethanolamine (TEA). The ethanolamines comprise a group of amino alcohols. A class of antihistamines is identified as ethanolamines, which includes carbinoxamine, clemastine, dimenhydrinate, chlorphenoxamine, diphenhydramine and doxylamine.
Application
Monoethanolamine is an important ingredient for wood preservative formulations. It is used to impregnate wood in outdoor applications to guarantee a long life cycle.It is used as feedstock in the production of detergents, emulsifiers, polishes, pharmaceuticals, corrosion inhibitors, chemical intermediates.In pharmaceutical formulations, MEA is used primarily for buffering or preparation of emulsions. MEA can be used as pH regulator in cosmetics.
| Chemical formula | C2H7NO |
|---|---|
| Molar mass | 61.084 g·mol−1 |
| Appearance | Viscous colourless liquid |
| Odor | Unpleasant ammonia-like odour |
| Density | 1.0117 g/cm3 |
| Melting point | 10.3 °C (50.5 °F; 283.4 K) |
| Boiling point | 170 °C (338 °F; 443 K) |
| Solubility in water | Miscible |
| Vapor pressure | 64 Pa (20 °C)[2] |
| Acidity (pKa) | 9.50[3] |
| Refractive index (nD) | 1.4539 (20 °C)[4] |
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