1 results about "Chlorothiazide" patented technology

This invention discloses a method for purifying hydrochlorothiazide, comprising dissolving crude hydrochlorothiazide in a mixture containing acid and solvent under heating conditions; then neutralizing with alkali under cooling conditions; and finally obtaining purified hydrochlorothiazide by cooling, crystallization, and filtration. The method provided by this invention further improves both the quality and purification yield of the hydrochlorothiazide product.