Methyl diethanolamine

Methyl diethanolamine

Names
Other names Bis(2-hydroxyethyl)methylamine
Identifiers
CAS Number	105-59-9 Y
Beilstein Reference	1734441
ChemSpider	7479 N
EC Number	203-312-7
Jmol 3D model	Interactive image
MeSH	N-methyldiethanolamine
PubChem	7767
RTECS number	KL7525000
InChI InChI=1S/C5H13NO2/c1-6(2-4-7)3-5-8/h7-8H,2-5H2,1H3 N Key: CRVGTESFCCXCTH-UHFFFAOYSA-N N
SMILES CN(CCO)CCO
Properties
Chemical 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
Solubility in water	Miscible
Vapor pressure	1 Pa (at 20 °C)
Refractive index (nD)	1.4694
Viscosity	101 mPa s (at 20°C)
Pharmacology
Routes of administration	Oral
Vapor pressure	{{{value}}}
Related compounds
Related alkanols	N-Methylethanolamine Dimethylethanolamine Diethylethanolamine Diethanolamine N,N-Diisopropylaminoethanol Triethanolamine Bis-tris methane
Related compounds	Diethylhydroxylamine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
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.

Similar compounds are monoethanolamine (MEA), a primary amine, and diethanolamine (DEA), a secondary amine, both of which are also used for amine gas treating. MDEA's defining characteristic when compared to these other amines is its ability to preferentially remove H₂S (and slip CO₂) from sour gas streams..

MDEA's popularity as a solvent for gas treating stems from several advantages it has when compared to other alkanolamines. One of these advantages is a low vapor pressure, which allows for high amine compositions without appreciable losses through the absorber and regenerator. MDEA is also resistant to thermal and chemical degradation and is largely immiscible with hydrocarbons. Lastly, MDEA has a relatively low heat of reaction with hydrogen sulfide and carbon dioxide, which allows for lower reboiler duties, thus lower operating costs.

This compound should not be confused with the recreational drug methylenedioxyethylamphetamine which is also abbreviated MDEA.

See also

• Amine gas treating

References

• The GPSA Databook