| IUPAC name
| Other names
|Molar mass||105.137 g/mol|
|Odor||Mild, ammonia, fish-like|
|Density||1.097 g/cm3 (20 °C)|
|Melting point||28 °C (82 °F; 301 K)|
|Boiling point||271.1 °C (520.0 °F; 544.2 K)|
|Solubility|| Miscible with alcohols, chloroform, glycerol, ketones|
Slightly soluble in benzene, diethyl ether
|Vapor pressure||2.8·10-4 mmHg at 25 °C|
Std enthalpy of
|−496.4 – −491.2 kJ/mol|
|Safety data sheet||Sigma-Aldrich|
|Flash point||138 °C (280 °F; 411 K)|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|710 mg/kg (rat, oral)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Diethanolamine, often abbreviated as DEA or DEOA, is an organic compound with the formula HN(CH2CH2OH)2 or C4H11NO2.
Diethanolamine is a base, and will react with acids to form salts.
Diethanolamine is a colorless solid that melts slightly above the room temperature. It has an ammonia-like odor and is miscible with water and many organic solvents.
Diethanolamine is sold by chemical suppliers.
Diethanolamine can be produced from the reaction of ethylene oxide with aqueous ammonia. The reaction produces ethanolamine, diethanolamine and triethanolamine, depending on the ratio of reagents used:
- C2H4O + NH3 → H2NCH2CH2OH
- C2H4O + H2NCH2CH2OH → HN(CH2CH2OH)2
- C2H4O + HN(CH2CH2OH)2 → N(CH2CH2OH)3
- Preparation of morpholine
- Corrosion inhibitor
- Remove hydrogen sulfide
- Synthesis of Ditazole
Diethanolamine is a potential skin irritant in workers sensitized by exposure to water-based metalworking fluids.
In closed bottles.
Diethanolamine is not particularly harmful. Since it's sometimes found in cosmetics, which do not require special disposal, diethanolamine can be strongly diluted with water and poured down the drain.
Alternatively, it may be mixed with a more flammable solvent and burned.