Description
Triethanolamine, often abbreviated as TEA or TEOA, is a versatile organic chemical compound widely used in a variety of industrial and consumer products.
Chemical Properties
| Property | Value |
|---|---|
| Appearance | Colorless to pale yellow viscous liquid |
| Odor | Ammonia-like, mild |
| Boiling Point | ~360°C |
| Melting Point | 21°C |
| Flash Point | > 180°C (high, non-flammable in normal use) |
| Density | 1.12 – 1.14 g/cm³ |
| Viscosity | High viscosity |
| Solubility | Completely soluble in water and alcohols |
| Hygroscopic | Yes |
Uses and Applications
Triethanolamine’s dual nature as an amine and an alcohol, combined with its strong alkaline properties, makes it a valuable component in numerous applications:
Cosmetics and Personal Care: This is one of its most common uses. It acts as an emulsifier, pH adjuster, and stabilizer in products like lotions, creams, shampoos, shaving creams, sunscreens, and makeup (eyeliner, mascara, foundation). It helps to blend oil and water, ensuring a smooth texture and stable formulation.
Industrial Applications:
Cement Production: It is used as a grinding aid and strength enhancer, preventing the cement powder from clumping during the grinding process.
Metalworking Fluids: It serves as a corrosion inhibitor to protect metal parts and machinery.
Paints, Inks, and Coatings: It acts as an emulsifier and dispersant, ensuring uniform application and enhancing durability.
Agriculture: It is used as a pH adjuster and stabilizer in herbicides and pesticides.
Pharmaceuticals: It is an excipient in topical and oral medications. In some eardrops, it is the active ingredient used to treat impacted earwax.
General Household Products: It is found in household cleaners, laundry detergents, and dishwashing liquids, where it functions as a surfactant, degreaser, and pH regulator.
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