Pure diethanolamine (DEA) is a white solid at room temperature, but its tendency to absorb water and to supercool means it is often encountered as a colorless, viscous liquid. Diethanolamine is polyfunctional, being a secondary amine and a diol. Like other organic amines, diethanolamine acts as a weak base.
DEA is used as a surfactant and a corrosion inhibitor. It is used to remove hydrogen sulfide and carbon dioxide from natural gas. Common industries include oil and gas, pharmaceuticals, and cosmetics.
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