Urea-D4 is the deuterated form of urea. Urea (T0738) functions as a potent protein denaturant through both direct and indirect mechanisms. It serves as an effective emollient and keratolytic agent and is used as a diuretic. Blood urea nitrogen (BUN) is utilized in evaluating kidney function. Urea (T0738) is extensively used as a nitrogen source in fertilizers and is an essential raw material in the chemical industry.