Chemical

Products

Monoethanolamine

Cas Number

141-43-5

Other Names

2-Aminoethanol,

2-Amino-1-ethanol,

Ethanolamine (not recommended[1]),

Monoethanolamine,

β-Aminoethanol,

β-hydroxyethylamine,

β-Aminoethyl alcohol,

Glycinol,

Olamine,

MEA,

Ethylolamine,

2-Hydroxyethylamine,

Colamine,

The formula

HOCH2CH2NH2

Introduction

Ethanolamine, also called 2-aminoethanol or monoethanolamine (often abbreviated as ETA or MEA), is an organic chemical compound with the formula HOCH2CH2NH2. The molecule is both a primary amine and a primary alcohol (due to a hydroxyl group).

Physical and Chemical Properties
Physical state and appearance Liquid. (Viscous liquid.)
Odor Ammoniacal. Fish. Unpleasant
Molecular Weight 61.08 g/mole
pH (1% soln/water) 10 [Basic.]
Color Colorless. Clear
Boiling Point 170.8°C (339.4°F)
Critical Temperature 341°C (645.8°F)
Melting Point 10.3°C (50.5°F)
Specific Gravity 1.018 (Water = 1)
Vapor Pressure 0.1 kPa (@ 20°C)
Vapor Density 2.1 (Air = 1)
Water/Oil Dist. Coeff The product is more soluble in water; log(oil/water) = -1.3
Dispersion Properties See solubility in water, methanol, diethyl ether, acetone
Solubility Soluble in cold water, hot water, methanol, acetone. Partially soluble in diethyl ether. Solubility in Benzene @ 25 deg. C: 1.4% Solubility in Ether: 2.1% Solubility in Carbon Tetrachloride: 0.2% Solubility in Heptane: <0.1% Miscible with Chloroform, Glycerin.
Assay of Monoethanolamines, % 99.6
Diethanolamine, % 0.05
Water, % 0.2
Applications

1. MEA is used in aqueous solutions for scrubbing certain acidic gases

2. It is used as feedstock in the production of detergents, emulsifiers, polishes, pharmaceuticals, corrosion inhibitors, chemical intermediates

3. Reacting ethanolamine with ammonia gives the commonly used chelating agent, ethylenediamine

4. It is also used in pharmaceutical formulations.MEA is primarily used for buffering or preparation of emulsions

5. Cement to enhance strength, reduce drying time and protect against the affects of freezing and thawing