👉 In organic chemistry, a triethanolamine is a type of ester that contains one ethane group. It is also known as a triethylenediamine (Tetrahydroxyacetone), and it has the chemical formula C2H5NHCH3. Triethanolamine can be produced by adding 1,2-dimethylammonium chloride to a solution of tetrahydrofuran.