N-MethyldiethanolaMine

N-MethyldiethanolaMine

CAS No.: 105-59-9
Molecular Formula: C5H13NO2
Molecular Weight: 119.16
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product description

N‑Methyldiethanolamine, commonly abbreviated as MDEA, is a colorless or pale yellow viscous liquid with a mild amine odor. It is a tertiary alkanolamine widely used in gas treatment, chemical synthesis, and industrial processing.


Chemical Properties

PropertyValue
Melting point-21 °C
Boiling point246-248 °C (lit.)
Density1.038 g/mL at 25 °C (lit.)
Vapor density4 (vs air)
Vapor pressure0.01 mm Hg (20 °C)
Refractive indexn20/D 1.469 (lit.)
Flash point260 °F
Storage conditionStore below +30°C.
SolubilitySoluble in chloroform (slightly), methanol (slightly)
Acid dissociation constant (pKa)14.41±0.10 (Predicted)
FormLiquid
ColorClear colorless to pale yellow
OdorAmmonia-like
pH value11.5 (100g/l, H₂O, 20°C)
pH range (indicator)11.5 at 100 g/l at 20 °C
Explosive limit0.9-8.4%(V)
Water solubilityMISCIBLE
BRN1734441
StabilityStable. Combustible. Incompatible with strong oxidizing agents.
Cosmetic ingredient functionFILM FORMING
InChI1S/C5H13NO2/c1-6(2-4-7)3-5-8/h7-8H,2-5H2,1H3
InChIKeyCRVGTSFCCXCTH-UHFFFAOYSA-N
SMILESN(CO)(CO)C(C)O
LogP-1.16 at 23°C
Surface tension33.5 mN/m at 303.15K
CAS database105-59-9 (CAS DataBase Reference)
NIST chemical substance informationMethyldiethanolamine (105-59-9)
EPA chemical substance informationN-Methyldiethanolamine (105-59-9)


Safety Information

PropertyValue
Hazard symbolXi
Hazard class code36
Safety description24
UN dangerous goods number2735
WGK Germany1
RTECS numberKL7525000
Autoignition temperature770 °F
TSCATSCA listed
HS code2922 17 00
Hazard class8
Packing groupII
Storage class10 - Combustible liquids
Hazard class (category)Eye irritation, Category 2
Hazardous substances data105-59-9 (Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: 4680 mg/kg


Product Usage

N-MethyldiethanolaMine is an important organic amine compound with wide industrial applications. In natural gas and refinery gas purification, it serves as a selective acid gas removal agent, efficiently absorbing hydrogen sulfide while minimizing co-absorption of carbon dioxide, thereby reducing energy consumption. In the coatings and polyurethane industries, it acts as a neutralizing agent and catalyst, used for pH adjustment in water-based coatings and for rigid foam production. Additionally, it is used as an intermediate in textile and pharmaceutical synthesis, as well as in flue gas desulfurization and as a rust inhibitor additive in metalworking fluids.

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FAQ

Q1:Does it support customized products?

A1:Yes, it does. Formulations can be adjusted and customized production can be carried out according to customer's industry needs and performance parameters.


Q2:Can samples be provided?

A2:We support free sample delivery and testing services to meet customers' early testing needs.


Q3:Is the product quality stable? 

A3:With full-process quality inspection and control, there are minimal batch differences, and the purity and stability strictly meet the standards.


Q4:What is the shipping cycle?

A4:For regular inventory, we offer quick delivery. For customized orders, we arrange production according to demand and ensure timely delivery.

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