‌Triethylamine is a colorless oily liquid with a strong ammonia odor or fishy smell, similar to the smell of ammonia water, and slightly fumes in the air.

Specifically, triethylamine appears as a colorless to light yellow transparent liquid, slightly soluble in water, but soluble in organic solvents such as ethanol and ether. Its chemical formula is C6H15N, boiling point is about 89.5℃, density is about 0.73, flash point is -7℃, and molecular weight is 101.196. These physical properties together determine the liquid form of triethylamine at room temperature and pressure.

Triethylamine has a wide range of uses. It is mainly used as a solvent, inhibitor, preservative, and can also be used to synthesize dyes, as an alkaline catalyst, and to adjust pH.

In detail, triethylamine has important applications in the following fields:

Solvent: Triethylamine is soluble in most organic solvents such as ethanol, ether, and acetone, so it is often used as a component of these solvents to help dissolve and disperse other substances.

‌Inhibitors and preservatives‌: In industry, triethylamine is used as an inhibitor to prevent the formation of polymers during certain chemical reactions. At the same time, it also has an antiseptic effect and can extend the shelf life of substances‌.

‌Synthetic dyes‌: Triethylamine can be used to synthesize dyes to help dye molecules disperse and dye better‌.

‌Alkaline catalyst‌: Triethylamine is an organic base that can form soluble salts with inorganic acids. In chemical synthesis, it is often used as an alkaline catalyst to catalyze reactions such as esterification, acylation and olefination‌.

‌Adjusting pH‌: Since triethylamine can react with acids to form salts, it can be used to neutralize acidic substances and change the acid-base balance of the reaction environment, which is very important in the artificial synthesis of organic compounds.

In addition, triethylamine can also be used as a high-energy fuel, rubber vulcanization accelerator, surfactant, wetting agent and bactericide, etc.‌.

However, although triethylamine is widely used in many fields, it also has certain toxicity and irritation. Therefore, it is necessary to strictly abide by safety operating procedures during use to ensure the safety of people and the environment.

Triethylamine Chemical Properties
Melting point -115 °C
Boiling point 90 °C
density 0.728
vapor density 3.5 (vs air)
vapor pressure 51.75 mm Hg ( 20 °C)
refractive index n20/D 1.401(lit.)
FEMA 4246 | TRIETHYLAMINE
Fp 20 °F
storage temp. Store below +30°C.
solubility water: soluble112g/L at 20°C
pka 10.75(at 25℃)
form Liquid
Specific Gravity 0.725 (20/4℃)
color Clear
PH 12.7 (100g/l, H2O, 15℃)(IUCLID)
Relative polarity 1.8
Odor Strong ammonia-like odor
Odor Type fishy
Odor Threshold 0.0054ppm
explosive limit 1.2-9.3%(V)
Water Solubility 133 g/L (20 ºC)
Merck 14,9666
JECFA Number 1611
BRN 1843166
Henry’s Law Constant 1.79 at 25 °C (Christie and Crisp, 1967)

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