Editing Ammonia solution (section)

== Laboratory use ==
Aqueous ammonia is used in traditional [[qualitative inorganic analysis]] as a complexant and base. Like many amines, it gives a deep blue coloration with copper(II) solutions. Ammonia solution can dissolve silver oxide residues, such as those formed from [[Tollens' reagent]]. It is often found in solutions used to clean gold, silver, and platinum jewelry, but may have adverse effects on porous gem stones like opals and pearls.<ref>The Jeweler's Bench. 2015. ''Fine Jewelry Cleaner''. Littleton, Colo.</ref>