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TABLE 8-1 Physical and Chemical Data on Monoethanolaminea

Synonyms

Aminoethanol, β-aminoethanol, 2-amino-1-ethanol, β-aminoethyl alcohol, 1-amino-2-hydroxyethane, ethanolamine, colamine, β-ethanolamine, ethylolamine, glycinol, 2-hydroxyethanamine, β-hydroxyethylamine, 2-hydroxyethylamine, olamine

CAS registry number

141-43-5

Molecular formula

HOCH2CH2NH2

Molecular weight

61.08

Boiling point

170.8°C

Melting point

10.3°C

Flash point

195°C

Explosive limits

5.5% to 17%

Specific gravity

1.0117 at 25°C/4°C

Vapor pressure

0.404 mmHg at 25°C

Solubility

Soluble in water, methanol, and acetone

Conversion factors

1 ppm = 2.5 mg/m3; 1 mg/m3 = 0.4 ppm

aData on explosive limits and vapor pressure were taken from HSDB (2003); all other data were taken from Budavari et al. (1989).

Abbreviations: mg/m3, milligrams per cubic meter; mmHg, millimeters of mercury; ppm, parts per million.

grinding fluids as corrosion inhibitors or to adjust pH (Kenyon et al. 1993). Analysis of a selection of machining and grinding fluids identified MEA at concentrations generally less than the detection limit (0.2 micrograms per milliliter [μg/mL]) to 2%; one product contained 11% MEA (Kenyon et al. 1993).

On board submarines, MEA is used in the ventilation system scrubbers to remove carbon dioxide from the air. No atmospheric measurements of MEA on board submarines have been reported.

SUMMARY OF TOXICITY

At high concentrations, airborne MEA is an irritant to the skin, eyes, and respiratory tract of laboratory animals. Continuous exposure to high concentrations of MEA for long periods of time has been reported to pro-



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