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Skeletal formula of diethylamine
Ball and stick model of diethylamine
CAS number 109-89-7 YesY
PubChem 8021
ChemSpider 7730 YesY
EC number 203-716-3
UN number 1154
MeSH diethylamine
RTECS number HZ8750000
Beilstein Reference 605268
Jmol-3D images Image 1
Molecular formula C4H11N
Molar mass 73.14 g mol−1
Appearance Colourless liquid
Odor Ichthyal, ammoniacal
Density 0.7074 g mL−1
Melting point −49.80 °C; −57.64 °F; 223.35 K
Boiling point 54.8 to 56.4 °C; 130.5 to 133.4 °F; 327.9 to 329.5 K
Solubility in water Miscible
log P 0.657
Vapor pressure 24.2–97.5 kPa
kH 150 μmol Pa−1 kg−1
Refractive index (nD) 1.385
heat capacity
178.1 J K−1 mol−1
Std enthalpy of
−131 kJ mol−1
Std enthalpy of
−3.035 MJ mol−1
GHS pictograms The flame pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The corrosion pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word DANGER
GHS hazard statements H225, H302, H312, H314, H332
GHS precautionary statements P210, P280, P305+351+338, P310
EU Index 612-003-00-X
EU classification Highly Flammable F Corrosive C
R-phrases R11, R20/21/22, R35
S-phrases (S1/2), S3, S16, S26, S29, S36/37/39
NFPA 704
Flammability code 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g., gasoline) Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g., calcium Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point −23 °C (−9 °F; 250 K)
Explosive limits 1.8–10.1%
Related compounds
Related amines
Related compounds
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Diethylamine is a secondary amine with the molecular structure CH3CH2NHCH2CH3 (also written as C4H11N). It is a flammable, strongly alkaline liquid. It is miscible with water and ethanol. It is a colorless liquid which often appears brown due to impurities. It is volatile and has a strong unpleasant odor.

Diethylamine is manufactured from ethanol and ammonia and is obtained together with ethylamine and triethylamine. It is used as a corrosion inhibitor and in the production of rubber, resins, dyes and pharmaceuticals.

Diethylamine is a corrosive chemical and contact with skin may cause irritation or burns.


  • Merck Index, 12th Edition, 3160.

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