What is ethanolamine (CAS 141-43-5)?
Ethanolamine, also known as 2-aminoethanol, is a versatile compound widely utilized across various industries due to its unique properties. This colorless, viscous liquid is an important building block in the synthesis of surfactants, emulsifiers, and corrosion inhibitors.
What is the boiling point of ethanolamine?
Ethanolamine, also known as 2-aminoethanol or MEA, has the molecular formula C₂H₇NO. It is a volatile organic amine compound with basic properties.
Ethanolamine has a boiling point of 170°C, classifying it as a low-boiling-point amine and it is also water-soluble. As ambient temperature increases, the energy within the ethanolamine molecule continuously increases, reducing the influence of the molecule's interaction with its surroundings, eventually leading to evaporation into a gaseous state. The relatively low boiling point of ethanolamine is related to the hydrogen bonding structure between its molecules.
Physical Properties of Ethanolamine (Monoethanolamine, MEA) (CAS 141-43-5)
| Item | Description / Value |
|---|---|
| Product Name | Ethanolamine |
| Other Name | Monoethanolamine (MEA) |
| Chemical Formula | C₂H₇NO |
| CAS Number | 141-43-5 |
| Molecular Weight | 61.08 g/mol |
| Appearance | Colorless to pale yellow viscous liquid |
| Odor | Ammonia-like |
| Density (20 °C) | 1.011–1.019 g/cm³ |
| Melting Point | ~10.5 °C |
| Boiling Point | ~170 °C |
| Flash Point (Closed Cup) | ~93 °C |
| Refractive Index (20 °C) | ~1.454 |
| Viscosity | High (viscous liquid) |
| Solubility in Water | Completely miscible |
| Solubility in Solvents | Miscible with alcohols; insoluble in non-polar solvents |
| Hygroscopicity | Strong; absorbs moisture and CO₂ from air |
Chemical Properties of Ethanolamine (Monoethanolamine, MEA)
| Item | Description |
|---|---|
| Functional Groups | Amino group (–NH₂) and hydroxyl group (–OH) |
| Chemical Nature | Alkanolamine |
| Basicity | Weakly alkaline |
| pH (10% aqueous solution) | 11.0 – 12.5 |
| Chemical Stability | Stable under normal temperature and pressure |
| Reactivity | Exhibits typical reactions of amines and alcohols |
| Reaction with Acids | Forms salts with inorganic and organic acids |
| Reaction with CO₂ | Readily absorbs CO₂, forming carbonate species |
| Reaction with Aldehydes/Ketones | Can undergo condensation reactions |
| Corrosiveness | Corrosive to certain metals |
| Flammability | Combustible at elevated temperatures |
| Oxidation | May react with strong oxidizing agents |
| Polymerization | Does not readily polymerize |
ethanolamine (CAS 141-43-5) Uses
Ethanolamine (including monoethanolamine, diethanolamine, and triethanolamine) is an important organic compound with a wide range of industrial applications. Its main functions include acting as a chemical reagent, solvent, emulsifier, rubber accelerator, corrosion inhibitor, and degradation agent. Its applications span multiple industries, such as chemical, pharmaceutical, agricultural, textile, and petroleum.
- Chemical Reagent and Solvent: Ethanolamine is commonly used as a reagent in chemical laboratories for the synthesis of other organic compounds. Due to its good solubility, it is also used as a solvent, particularly in paints and cleaning agents.
- Emulsifier:Ethanolamine is used as an emulsifier in cosmetics and personal care products, helping oils and water mix to form stable emulsions.
- Rubber Accelerator:In the rubber industry, ethanolamine is used as an accelerator to accelerate the vulcanization process of rubber and improve the performance of rubber products.
- Corrosion Inhibitor:Ethanolamine is used as a corrosion inhibitor in the oil and gas industry to protect pipelines and equipment from corrosion by acidic gases.
- Degrading Agent: Ethanolamine is also used to degrade certain harmful chemicals, such as pesticides and pollutants in industrial wastewater.
- Other Applications: Ethanolamine is also used in the preparation of surfactants, pharmaceutical intermediates, textile auxiliaries, and gas purification agents.
How is ethanolamine (CAS 141-43-5) stored safely?
To ensure the safe use of ethanolamine, the following recommendations are provided:
Ethanolamine should be stored in a cool, dry, well-ventilated place, away from fire and heat sources, and away from direct sunlight.
During handling, personal protective equipment such as respirators, chemical protective goggles, and protective clothing should be worn to prevent direct skin contact or vapor inhalation.
While using ethanolamine, monitor your physical condition. If any discomfort occurs, seek medical attention immediately.
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Bulk Industrial buyers often purchase Ethanolamine (CAS 141-43-5) together with other solvents and intermediates.
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