6-Destrifluoromethyl-5-trifluoromethyl Bendoflumethiazide is an impurity of Bendroflumethiazide (B133500), a thiazide diuretic that is used to treat patients with Arterial Hypertensive Disease. Bendroflumethiazide works by blocking sodium reabsorption in the distal tubules within the kidneys.