Home Categories Organic Chemistry Diethanolamine
A3212112

Diethanolamine , AR,99% , 111-42-2

Synonym(s):
ß,ß′-Dihydroxydiethylamine, Bis-(ß-hydroxyethyl)-amine;2,2′-Iminodiethanol;Bis(2-hydroxyethyl)amine;Diethanolamine

CAS NO.:111-42-2

Empirical Formula: C4H11NO2

Molecular Weight: 105.14

MDL number: MFCD00002843

EINECS: 203-868-0

Update time: 2022-07-08

PRODUCT 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 1.477(lit.)
Flash point: 280 °F
storage temp.  2-8°C
solubility  H2O: 1 M at 20 °C, clear, colorless
form  Viscous Liquid or Low Melting Solid
color  APHA: ≤15
Specific Gravity 1.09
Odor Mild ammoniacal; faint, fishy; characteristic.
PH 11.0-12.0 (25℃, 1M in H2O)
pka 8.88(at 25℃)
explosive limit 2.1-10.6%(V)
Water Solubility  MISCIBLE
Sensitive  Hygroscopic
λmax λ: 260 nm Amax: 0.04
λ: 280 nm Amax: 0.02
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℃

Description and Uses

Diethanolamine is an organic base which has been used as an emulsifying and dispersing agent.It can also be used as a basic buffer, with optimal pH about pH 9, if titrated with HCl or other acid. Other uses include: to "scrub" gases, as a chemical intermediate, as humectant or softening agent.

Diethanolamine similar to triethanolamine (T775580) is used as a surfactant. It also has the potential to be a corrosion inhibitor by means of chemisorption.

Safety

Symbol(GHS) 
GHS05,GHS07,GHS08
Signal word  Danger
Hazard statements  H302-H315-H318-H361fd-H373
Precautionary statements  P202-P280-P301+P312-P302+P352-P305+P351+P338-P308+P313
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
3
Autoignition Temperature 689 °F
TSCA  Yes
PackingGroup  II
HS Code  29221200
Toxicity LD50 orally in rats: 12.76 g/kg (Smyth)

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