Products Description
Diethanolamine (DEA) is an organic compound belonging to the class of alkanolamines. Its molecular structure consists of two ethanol groups and one amino group, giving it distinctive chemical properties that contribute to its wide range of industrial applications. Diethanolamine exhibits good solubility in polar solvents, including water, ethanol, and acetone, and is completely miscible with water in all proportions. This characteristic makes it particularly suitable for applications requiring aqueous solutions. In contrast, it is only slightly soluble in benzene and ether and is virtually insoluble in non-polar organic solvents such as carbon tetrachloride and n-heptane.
Chemical Properties
Melting point | 28 °C (lit.) |
Boiling point | 217 °C/150 mmHg (lit.) |
density | 1.097 g/mL at 25 °C (lit.) |
vapor density | 3.6 (vs air) |
vapor pressure | <0.98 atm ( 100 °C) |
refractive index | n20/D |
Fp | 280 °F |
storage temp. | 2-8°C |
solubility | H2O: 1 M at 20 °C, clear, colorless |
form | Viscous Liquid or Low Melting Solid |
Specific Gravity | 1.09 |
color | APHA: ≤15 |
PH | 11.0-12.0 (25℃, 1M in H2O) |
pka | 8.88(at 25℃) |
Odor | Mild ammoniacal; faint, fishy; characteristic. |
explosive limit | 2.1-10.6%(V) |
Water Solubility | MISCIBLE |
Sensitive | Hygroscopic |
λmax | λ: 260 nm Amax: 0.04 |
Merck | 14,3107 |
BRN | 605315 |
Exposure limits | TLV-TWA 3 ppm (～13 mg/m3) (ACGIH). |
Dielectric constant | 2.8（25℃） |
Stability: | Stable. Incompatible with carbon dioxide, strong acids, strong oxidizing agents. Deliquescent. |
InChIKey | ZBCBWPMODOFKDW-UHFFFAOYSA-N |
LogP | -2.46 at 25℃ |
CAS DataBase Reference | 111-42-2(CAS DataBase Reference) |
IARC | 2B (Vol. 77, 101) 2013 |
NIST Chemistry Reference | Diethanolamine(111-42-2) |
EPA Substance Registry System | Diethanolamine (111-42-2) |
Safety Information
Hazard Codes | Xn |
Risk Statements | 22-38-41-48/22 |
Safety Statements | 26-36/37/39-46 |
RIDADR | 3267 |
OEB | A |
OEL | TWA: 3 ppm (15 mg/m3) |
WGK Germany | 1 |
RTECS | KL2975000 |
F | 3 |
Autoignition Temperature | 689 °F |
TSCA | Yes |
PackingGroup | II |
HS Code | 29221200 |
Hazardous Substances Data | 111-42-2(Hazardous Substances Data) |
Toxicity | LD50 orally in rats: 12.76 g/kg (Smyth) |
Product Applications
Diethanolamine (DEA) has a wide range of industrial and commercial applications. It is commonly used as a gas purification agent to remove acidic impurities from gases, particularly in the treatment of cracking gases and coal- or oil-derived gas streams containing carbonyl sulfide, which can react with monoethanolamine.
In addition, diethanolamine serves as an intermediate in the production of rubber chemicals and surfactants. It is widely used in the manufacture of specialty textile chemicals, herbicides, and petroleum demulsifiers. Due to its emulsifying and dispersing properties, it is also applied in various agricultural formulations, cosmetics, and pharmaceutical products. Furthermore, diethanolamine is used in the production of textile lubricants and functions as a humectant and softening agent. It also plays an important role as an intermediate in various organic synthesis processes.
