What is Monoethanolamine and what is it used for


Monoethanolamine commonly known as MEA is an organic chemical compound that is both a primary amine and a primary alcohol. Like other amines, monoethanolamine acts as a weak base / alkali. Ethanolamine is a flammable, corrosive, colourless, odourless liquid with a mild odour of ammonia. MEA is obtained from the reaction between ammonia and ethylene oxide.

  • Other Names: 2-aminoethanol, monoethanolamine, beta-aminoethanol, beta-aminoethyl alcohol, ethylolamine, glycinol, olamine, MEA, UASF EK-1597, colamine, beta-hydroxyethylamine
  • CAS: 141–43–5
  • EINECS No: 205–483–3
  • Formula: HOCH2CH2NH2
  • Mol. Weight: 61.08
  • UN No: 2491
  • Appearance: Colourless liquid with an odour of ammonia
  • FlashPoint (oC): 85
  • Density (kg/L): 1.02
  • Melting point: 10 – 12 C
  • Boiling point: 170 C
  • pH: 11.8
  • Solubility: Soluble in water in all proportions
  • Vapour pressure: 0.4 mmHg
  • Incompatibilities & Reactivities: Strong oxidizers, strong acids, iron [Note: May attack copper, brass, and rubber.]


Monoethanolamine is a chemical intermediate in the manufacture of cosmetics, surface-active agents, emulsifiers, pharmaceuticals, and plasticizing agents; a gas-scrubbing agent for the absorption and removal of H2S and CO2 from refinery and natural gas streams; carbon dioxide and ammonia manufacturing.

  • MEA is used in aqueous solutions for scrubbing acidic gases.
  • It is used as feedstock in the production of detergents, emulsifiers, polishes, pharmaceuticals, corrosion inhibitors, chemical intermediates.
  • It is used to neutralise fatty acids like stearic acid and oleic acid to produce soaps, creams, shaving foams etc.
  • Reacting ethanolamine with ammonia gives the commonly used ethylenediamine.
  • In Cement production it is used to enhance strength, reduce drying time and protect against the affects of freezing and thawing.
  • In metal working fluids it is used to neutralize acid components in lubricants, prevent corrosion and rusting, and for proprietary corrosion inhibitors and biocides.
  • In printing inks to control the pH.
  • monoethanolamine pulping of beech and spruce wood for production of dissolving pulp.
  • In agrochemicals it is used as neutralizer agent for anionic emulsifiers.

Health & Safety

R-phrase(s): R20/21/22 Harmful by inhalation, in contact with skin and if swallowed. R34 Causes burns.

S-phrase(s): S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 Wear suitable protective clothing, gloves and eye/face protection. S45 In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).

For more information see MSDS for monoethanolamine on the website www.mistralni.co.uk

Where to Buy Monoethanolamine MEA Online

Where to Buy Triethanolamine TEA


About mistralhowto

formulation chemist

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