N-methyldiethanolamine (MDEA) is a tertiary amine. MDEA is a versatile, polyfunctional molecule that combines thecharacteristics of amines and alcohols. MDEA is capable of undergoing reactions typical of both alcohols and amines, forming Quaternary amine salts, soaps, and esters.

This makes MDEA a useful intermediate in the synthesis of numerous products, and has resulted in its use in many diverse areas, including coatings, textile lubricants, polishes, detergents,pesticides, personal care products, and pharmaceuticals.