Monoethanolamine is the most important product among amino alcohols, accounting for more than 90% of the production. Ethanolamine includes monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA). It is not only the core raw material of the metalworking fluid industry, but also used in shampoo, laundry detergent, hair dye and other products in daily life. Monoethanolamine is also used in the manufacturing process of textiles.
Monoethanolamine is also known as 2-aminoethanol, monoethanolamine, beta-aminoethanol, 2-hydroxyethylamine, beta-hydroxyethylamine, hydroxyethylamine and cholamine. There are three types of ethanolamine: -ethanolamine, diethanolamine and triethanolamine. Monoethanolamine is commonly known as ethanolamine. This article is monoethanolamine (see other articles). Monoethanolamine is present in phospholipids, coexisting with choline; it can also be found in fermentation broths of serum albumin. Colorless viscous liquid. Has a strong hygroscopicity. There is ammonia smell. The relative molecular mass is 61.01. The relative density is 1.0180. Melting point 10.3 ℃. Boiling point 170.8 ℃. 70～72℃(1.600×103Pa), 58℃(0.667×103Pa). Flash point 93 ℃. Refractive index 1.4541. Viscosity 18.95 mPa·s (25°C), 5.03 (60°C). Slightly soluble in benzene (1.4 at 25°C), ether (2.1), carbon tetrachloride (0.2) and n-hexane (0.1). Miscible with water, methanol, ethanol and acetone. Strongly alkaline, 25% aqueous solution pH=12.1. It can absorb acid gas, and after heating, it can release the absorbed gas, such as absorbing carbon dioxide from air, absorbing sulfur dioxide and carbon dioxide from mixed gas. Emulsifying and foaming. It can form salts with inorganic or organic acids, and esters with acid anhydrides. Its amino and hydroxyl groups can have corresponding effects, respectively. Oral LD5010200mg/kg for rats.