Diethanolamine is a colorless liquid. Diethanolamine is widely used in the manufacturing of agricultural products, pharmaceutical products, and textile processing. Diethanolamine is widely used to prepare long-chain fatty acid salts of diethanolamides and diethanolamine that are formulated into soaps, surfactants, cosmetics, and hair care products. Diethanolamine is used to prepare buffer solution, as an absorbent to capture CO2 gas, as an anticorrosion agent in metalworking fluids, and as a thickening agent in shampoo. It is also used as a reactant and solvent in organic synthesis.