Triethanolamine (TEA)

Triethanolamine, often abbreviated as TEA, is a viscous organic compound that is both a tertiary amine and a triol. A triol is a molecule with three alcohol groups. Triethanolamine is a strong base. Triethanolamine can also be abbreviated as TEOA, which can help to distinguish it from triethylamine. Approximately 150,000 tonnes were produced in 1999. It is a colourless compound although samples may appear yellow because of impurities.

Parameter Value

CAS Number

102-71-6 

Chemical formula

C6H15NO3

Molar mass

149.19 g·mol−1

Appearance

Colourless liquid

Odor

Ammoniacal

Density

1.124 g mL−1

Melting point

21.60 °C; 70.88 °F; 294.75 K

Boiling point

335.40 °C; 635.72 °F; 608.55 K

Solubility in water

149 g L−1 (at 20 °C)

log P

−0.988

Vapor pressure

1 Pa (at 20 °C)

Acidity (pKa)

7.74

UV-vis (λmax)

280 nm

Refractive index (nD)

1.485

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