Precursor to other<unk>  compounds<unk>  is the least expensive salt of<unk> ; it offers several other advantages as well. It is non-hygroscopic, in contrast to<unk>  fluoroborate and<unk>  perchlorate. It is relatively stable to light. Finally, it dissolves in numerous solvents, including water. The<unk>  can be easily replaced by other ligands, rendering<unk>  versatile. Treatment with solutions of halide ions gives a precipitate of AgX (X = Cl, Br, I). When making photographic film,<unk>  is treated with halide salts of sodium or potassium to form insoluble<unk>  halide in situ in photographic gelatin, which is then applied to strips of tri-acetate or polyester. Similarly,<unk>  is used to prepare some<unk> -based explosives, such as the fulminate, azide, or acetylide, through a precipitation reaction. Treatment of<unk>  with base gives dark grey<unk>  oxide: :2<unk>  + 2 NaOH → Ag2O + 2 NaNO3 + H2O Halide abstraction The<unk>  cation, , reacts quickly with halide sources to produce the insoluble<unk>  halide, which is a cream precipitate if is used, a white precipitate if is used and a yellow precipitate if is used. This reaction is commonly used in inorganic chemistry to abstract halides: :(aq) + (aq) → AgX(s) where = , , or . Other<unk>  salts with non-coordinating anions, namely<unk>  tetrafluoroborate and<unk>  hexafluorophosphate are used for more demanding applications. Similarly, this reaction is used in analytical chemistry to confirm the presence of chloride, bromide, or iodide ions. Samples are typically acidified with dilute nitric acid to remove interfering ions, e.g. carbonate ions and sulfide ions. This step avoids confusion of<unk>  sulfide or<unk>  carbonate precipitates with that of<unk>  halides. The color of precipitate varies with the halide: white<unk>  chloride), pale yellow/cream<unk>  bromide), yellow<unk>  iodide). AgBr and especially AgI photo-decompose to the metal, as evidence by a grayish color on exposed samples. The same reaction was used on steamships in order to determine whether or not boiler feedwater had been contaminated with seawater. It is still used to determine if moisture on formerly dry cargo is a result of condensation from humid air, or from seawater leaking through the hull. Organic synthesis<unk>  is used in many ways in organic synthesis, e.g. for deprotection and oxidations. binds alkenes reversibly, and<unk>  has been used to separate mixtures of alkenes by selective absorption. The resulting adduct can be decomposed with ammonia to release the free alkene.<unk>  is highly soluble in water but is poorly soluble in most organic solvents, except acetonitrile (111.8 g/100 g, 25 °C). Biology In histology,<unk>  is used for<unk>  staining, for demonstrating reticular fibers, proteins and nucleic acids. For this reason it is also used to demonstrate proteins in PAGE gels. It can be used as a stain in scanning electron microscopy. Indelible ink<unk>  produces long-lasting stain when applied to skin. An electoral stain makes use of this to mark a finger of people who have voted in an election, allowing easy identification to prevent double-voting.
Silver nitrate
Silver diammine fluoride
Perchloryl fluoride
Amylmetacresol
Arsenic trichloride
Tetrachlorodecaoxide
Amine fluoride
Zinc cadmium sulfide