S 1559 (OTTO) Silver nitrite, 99.98% Cas 7783-99-5 - used in the silver plating process, hair dye, inks, permanent marker pens and determination of chloride ions in water and drilling fluids. S 1559 (OTTO) Silver nitrite, 99.98% Cas 7783-99-5 - used as Tollens reagent and used in the formation of aniline and nitro compounds in victor mayer reactions.