Monoethanolamine
Monoethanolamine
Grade:
Monoethanolamine
Ethanolamine (MEA)
CAS: 141-43-5
EINECS 205-483-3
Chemical formula: C2H7NO
Molecular weight: 61.08
Density: 1.012 g/mL at 25°C (lit.)
Melting point: 10 - 11°C (lit.)
Boiling point: 170°C (lit.)
Flash point: 200°F
Monoethanolamine, also known as monoethanolamine, 2-aminoethanol, 2-hydroxyethylamine, is a colorless, transparent and viscous liquid at room temperature, with hygroscopicity and an ammonia-like odor. It is miscible with water, ethanol, and acetone, and slightly soluble in benzene, ether, carbon tetrachloride, ethanol, and chloroform. It reacts vigorously with strong acids such as sulfuric acid, nitric acid, and hydrochloric acid. It reacts with inorganic and organic acids to form esters. It is flammable and poses a risk of combustion when exposed to high temperatures, open flames, or contact with oxidizing agents.
| Item | Index |
| Purity (as Monoethanolamine), wt %≥ | 99.5 min |
| Diethavolamine + Triethanolamine, wt % | Measured Value |
| Color (Hazen Pt,Co) ≤ | 25 max |
| Water content, wt%≤ | 0.5 max |
| Distillation experiment (0鈩, 101325KP, 168~174 鈩 Distillate volume, ml), wt %≥ |
95 max |
| Relative density, ρ 20鈩, g/cm3 | 1.014-1.019 |
| Appearance | Transparent liquid,no visible impurities |
Monoalcohols can be used as chemical reagents, pesticides, pharmaceuticals, solvents, dye intermediates, rubber accelerators, corrosion inhibitors, and surfactants, etc. They can also be used as acid gas absorbers, emulsifiers, plasticizers, rubber vulcanizing agents, dye brighteners, and fabric moth repellents, etc.
They can also be used as plasticizers, vulcanizing agents, accelerators, and foaming agents for synthetic resins and rubbers, as well as intermediates for pesticides, pharmaceuticals, and dyes.
They are also raw materials for emulsifiers in synthetic detergents and cosmetics.
In the textile industry, they are used as fluorescent brighteners, antistatic agents, moth repellents, and detergents.
They are also used as ink additives and petroleum additives.
The largest consumption area of monoethanolamine is in surfactants. It can not only be directly used as a surfactant, but also be combined with various acids to synthesize important and commonly used surfactants, such as alkanolamides and triethanolamine dodecylbenzene sulfonate, etc. Surfactants are mainly applied in detergents, chemical industries, and other fields. Monoethanolamine can be used as a catalyst and crosslinking agent in the polyurethane (coatings) industry; it is used to synthesize high-grade dyes in the dye and chemical industry; it is a neutralizer in the rubber and ink industries; it is also used in rust inhibitors, preservatives, and paint manufacturing. It can be used as an absorber for acidic gases such as hydrogen sulfide, hydrogen cyanide, and carbon dioxide, with the advantages of fast absorption rate and low cost. It is widely used in the absorption process of carbon dioxide in the power industry. It has the disadvantages of small capacity, certain corrosiveness, high desorption energy consumption, and easy oxidation by SO2 and O2 in flue gas. Monoethanolamine is also an important corrosion inhibitor, which plays a corrosion-inhibiting role in boiler water treatment, automotive engine coolants, drilling and cutting oils, and various types of lubricating oils. However, monoethanolamine should not be used in combination with nitrite corrosion inhibitors.
