Methyl diethanolamine

Methyl diethanolamine
Names
Other names
Bis(2-hydroxyethyl)methylamine
Identifiers
1734441
105-59-9 Yes
ChemSpider 7479 
EC number 203-312-7
Jmol-3D images Image
MeSH N-methyldiethanolamine
PubChem 7767
RTECS number KL7525000
Properties
Molecular formula
 C5H13NO2
Molar mass 119.16 g·mol−1
Appearance Colorless liquid
Odor Ammoniacal
Density 1.038 g mL−1
Melting point −21.00 °C; −5.80 °F; 252.15 K
Boiling point 247.1 °C; 476.7 °F; 520.2 K
Miscible
Vapor pressure 1 Pa (at 20 °C)
1.4694
Viscosity 101 mPa s (at 20°C)
Pharmacology
Oral
Hazards
GHS pictograms
GHS signal word WARNING
H319
P305+351+338
EU Index 603-079-00-5
EU classification Xi
R-phrases R36
S-phrases (S2), S24
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
1
1
0
Flash point 127 °C (261 °F; 400 K)
410 °C (770 °F; 683 K)
Explosive limits 1.4-8.8%
1.945 g kg−1 (oral, rat)
Related compounds
Related alkanols
Related compounds
 Diethylhydroxylamine
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Methyl diethanolamine is a clear, colorless or pale yellow liquid with an ammonia odor. It is miscible with water, alcohol and benzene. Methyl diethanolamine is also known as N-methyl diethanolamine and more commonly as MDEA. It has the formula CH3N(C2H4OH)2. MDEA is a tertiary amine and is widely used as a sweetening agent in chemical, oil refinery, syngas production and natural gas. This compound should not be confused with the recreational drug methylenedioxyethylamphetamine which is also abbreviated MDEA.

MDEA's popularity as a solvent for gas treating stems from several advantages it has over other alkanolamines, especially its ability to preferentially remove H2S (and slip CO2) from sour gas streams.

Similar compounds are monoethanolamine (MEA), a primary amine, and diethanolamine (DEA), a secondary amine, both of which are also used for amine gas treating.

See also

References