Torsemide (Standard) is the standard substance of Torsemide, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Torsemide (AC-4464) is an anilinopyridine sulfonylurea belonging to the class of loop diuretics. Torsemide has a prolonged duration of action compared to other loop diuretics, is extensively protein bound in plasma and has a relatively long half-life.