naphazoline hydrochloride and its Impurities

It is a hydrochloride salt of Naphazoline, which is a vasoconstrictor. It is a sympathomimetic agent with alpha adrenergic activity. Naphazoline is used in several eye drops. Reference standards of Naphazoline Hydrochloride API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.