Overview
Monoethanolamine (MEA) is an organic compound belonging to the ethanolamine family, characterized by its amino and hydroxyl functional groups. It is a colorless, viscous liquid with a distinct ammonia-like odor. MEA is highly soluble in water and exhibits both alkaline and hygroscopic properties, making it a versatile chemical in industrial applications. MEA is synthesized through the reaction of ethylene oxide with ammonia, a process that yields a mixture of ethanolamines, including diethanolamine (DEA) and triethanolamine (TEA). Due to its reactivity and solubility, MEA is widely used in gas treatment, detergents, and pharmaceuticals, among other industries.
Physical and Chemical Properties
Monoethanolamine is a stable compound under normal conditions but can react vigorously with strong acids and oxidizers. Its boiling point of 170°C and melting point of 10.3°C make it suitable for various temperature-dependent processes. The compound's density is 1.012 g/cm³ at 20°C, and it is miscible with water, alcohols, and acetone. MEA's alkaline nature (pH ~12 in aqueous solutions) and hygroscopicity contribute to its effectiveness in applications like gas scrubbing and corrosion inhibition. However, these properties also necessitate careful handling to avoid skin or eye irritation and material degradation.
Main Applications
MEA is primarily used in gas treatment, particularly for removing carbon dioxide (CO₂) and hydrogen sulfide (H₂S) from natural gas and refinery streams. Its ability to absorb acidic gases makes it a key component in amine scrubbing systems. In the detergent industry, MEA acts as a surfactant and pH adjuster, enhancing cleaning efficiency. Other applications include pharmaceuticals, where MEA serves as an intermediate in drug synthesis, and agriculture, where it is used in herbicides and fungicides. Additionally, MEA is employed in the production of corrosion inhibitors, textile chemicals, and personal care products.
Safety and Storage
MEA poses moderate health risks, including skin and eye irritation upon contact. Inhalation of vapors may cause respiratory discomfort, and prolonged exposure can lead to more severe effects. Proper personal protective equipment (PPE), such as gloves, goggles, and respirators, is essential when handling MEA. Storage requires a cool, dry, well-ventilated area, away from oxidizers and acids. Containers should be tightly sealed to prevent moisture absorption and contamination. Spills should be neutralized with a weak acid and cleaned up immediately to avoid environmental hazards.
B2B Procurement Guide
When procuring MEA, buyers should prioritize purity (typically ≥99%), packaging (drums, IBCs, or bulk), and supplier certifications (ISO, REACH, etc.). Pricing fluctuates based on raw material costs and demand, with reference ranges of $1,200-$1,500 per metric ton. Key considerations include verifying the supplier's track record, logistical capabilities, and compliance with regional regulations. Bulk purchases may offer cost advantages, but storage capacity and shelf-life constraints should be evaluated. Technical support and after-sales service are also valuable for industrial users.
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