N-甲基二乙醇胺

Description

N-Methyldiethanolamine · CAS 105-59-9 · C5H13NO2. UNII 3IG3K131QJ. Boiling Point: 477 °F at 760 mmHg (NTP, 1992); Boiling Point: 245 °C; Boiling Point: 247 °C.

Identification

CAS Registry Number	105-59-9
PubChem CID	7767
Molecular formula	C5H13NO2
IUPAC name	2-[2-hydroxyethyl(methyl)amino]ethanol
UNII (FDA)	3IG3K131QJ

Computed Descriptors

Molecular Weight	119.16
XLogP3	-1.1
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	4
Exact Mass	119.094628657
Monoisotopic Mass	119.094628657
Topological Polar Surface Area	43.7
Heavy Atom Count	8
Formal Charge	0

Physical & Chemical Properties

Boiling Point	477 °F at 760 mmHg (NTP, 1992)
Boiling Point	245 °C
Boiling Point	247 °C
Melting Point	-6 °F (NTP, 1992)
Melting Point	-21 °C
Flash Point	260 °F (NTP, 1992)
Flash Point	127 °C (261 °F) - closed cup
Flash Point	260 °F (127 °C) (Open Cup)
Flash Point	136 °C c.c.
Density	1.043 g/cu cm at 25 °C

Physical description & handling notes

• Methyldiethanolamine is a colorless liquid. (USCG, 1999)
• Liquid
• Colorless liquid; [ICSC] Clear light yellow liquid; [Sigma-Aldrich MSDS]
• COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.
• Colorless liquid
• Amine-like odor

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS
GHS notification summary	0.1% (1 / 1451)

GHS Hazard Classification

GHS notification summary	0.1% (1 / 1451)
Reported hazard statements	H319, H320, H361

Documented Uses

• Metal Machining [Category: Heat or Machine]
• Petroleum Production and Refining [Category: Industry]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Cement Producing [Category: Industry]
• Intermediate, absorption of acidic gases, catalyst for polyurethane foams, pH control agent.
• Methyldiethanolamine (MDEA) and solutions of MDEA have increased in use for gas treating. Additional gas treating capacity can often be obtained with the same working equipment, because of the higher amine concentrations that can be used.

Synonyms

N-METHYLDIETHANOLAMINE; 105-59-9; Methyldiethanolamine; Methyl diethanolamine; N-Methylaminodiglycol; Ethanol, 2,2'-(methylimino)bis-; 2,2'-(Methylimino)diethanol; N-Methyliminodiethanol; Diethanolmethylamine; Methyliminodiethanol; USAF DO-52; Bis(2-hydroxyethyl)methylamine; Methylbis(2-hydroxyethyl)amine; N-Methyl-2,2'-iminodiethanol; N-Methyldiethanolimine; N,N-Bis(2-hydroxyethyl)methylamine

Frequently Asked Questions

What are the CAS number and molecular formula of N-Methyldiethanolamine?

CAS 105-59-9; molecular formula C5H13NO2; molecular weight — g/mol.

What other names is N-Methyldiethanolamine known by?

N-METHYLDIETHANOLAMINE, 105-59-9, Methyldiethanolamine, Methyl diethanolamine, N-Methylaminodiglycol, Ethanol, 2,2'-(methylimino)bis-.

What is the regulatory status of N-Methyldiethanolamine?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS.

Is N-Methyldiethanolamine classified as hazardous?

0.1% of GHS notifications report no hazard classification (1 of 1451).

What are the key physical properties of N-Methyldiethanolamine?

Boiling Point: 477 °F at 760 mmHg (NTP, 1992); Boiling Point: 245 °C; Boiling Point: 247 °C; Melting Point: -6 °F (NTP, 1992).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.