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Key Documents

90279

Sigma-Aldrich

Triethanolamine

≥99.0% (GC)

Synonym(s):

2,2′,2′′-Nitrilotriethanol, Tris(2-hydroxyethyl)amine

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About This Item

Linear Formula:
(HOCH2CH2)3N
CAS Number:
Molecular Weight:
149.19
Beilstein:
1699263
EC Number:
MDL number:
UNSPSC Code:
12161700
PubChem Substance ID:
NACRES:
NA.25
technique(s):
GC/GC: suitable
bp:
190-193 °C/5 mmHg (lit.)
vapor pressure:
0.01 mmHg ( 20 °C)

vapor density

5.14 (vs air)

Quality Level

vapor pressure

0.01 mmHg ( 20 °C)

Assay

≥99.0% (GC)

form

liquid
viscous liquid

autoignition temp.

600 °F

expl. lim.

8.5 %

technique(s)

GC/GC: suitable

impurities

≤0.1% ethanolamine (GC)
≤0.2% water
≤0.3% diethanolamine (GC)

refractive index

n20/D 1.485 (lit.)

pH

10.5-11.5 (25 °C, 149 g/L)

useful pH range

7.3-8.3

pKa (25 °C)

7.8

bp

190-193 °C/5 mmHg (lit.)

mp

17.9-21 °C (lit.)

solubility

H2O: 1 M, clear, colorless

density

1.124 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg
sulfate (SO42-): ≤20 mg/kg

cation traces

Ca: ≤5 mg/kg
Cd: ≤1 mg/kg
Co: ≤1 mg/kg
Cr: ≤1 mg/kg
Cu: ≤1 mg/kg
Fe: ≤1 mg/kg
K: ≤20 mg/kg
Mg: ≤1 mg/kg
Mn: ≤1 mg/kg
Ni: ≤1 mg/kg
Pb: ≤1 mg/kg
Zn: ≤1 mg/kg

SMILES string

OCCN(CCO)CCO

InChI

1S/C6H15NO3/c8-4-1-7(2-5-9)3-6-10/h8-10H,1-6H2

InChI key

GSEJCLTVZPLZKY-UHFFFAOYSA-N

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General description

Triethanolamine (TEA) belongs to the family of ethanolamine. It includes the properties of both amines and alcohols. Addition of TEA to an acidic buffer facilitates the determination of fluoride in inorganic orthophosphates by using a fluoride-selective electrode.

Application

Triethanolamine (TEA) has been used:
  • as a component of the acetylation working solution
  • in the preparation of polyethylene glycol (PEG) hydrogels
  • as a constituent of CO2/O2 specificity (SC/O) assay buffer

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

354.2 °F - closed cup

Flash Point(C)

179 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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