N-Nitroso Valsartan Cyano Desvaleryl Methyl Ester is primarily used as a reference standard or analytical impurity standard in pharmaceutical quality-control testing and research related to valsartan.

Its purpose is to identify detect and quantify this specific impurity or degradation-related compound in valsartan drug substances and pharmaceutical products during analytical testing.

N-Nitroso Valsartan Cyano Desvaleryl Methyl Ester is a nitrosamine-related compound associated with valsartan chemistry. It is generally handled in very small quantities as an analytical reference material for impurity profiling and method validation rather than as an active pharmaceutical ingredient.