silver nitrate
- Noun:
- A chemical compound: Silver nitrate is an inorganic compound with the chemical formula AgNO₃. It is a colorless or white crystalline solid that is highly soluble in water.
- A versatile agent: Historically and currently, it is used in several applications due to its chemical properties, most notably in photography, medicine, and as a laboratory reagent.
- Noun:
- In the darkroom, the photographer carefully dissolved silver nitrate to prepare the light-sensitive emulsion for the photographic plates.
- The doctor applied a stick of silver nitrate to cauterize the small wound and prevent infection.
- Silver nitrate solution is used in the Tollens' test to distinguish between aldehydes and ketones in organic chemistry.
- "Lunar caustic": A historical and alternative name for silver nitrate, referring to its corrosive, burning (caustic) nature and its silver-white color reminiscent of the moon (lunar).
- In ancient alchemy, lunar caustic was a substance of great interest.
- In analytical chemistry, a solution of silver nitrate is a standard reagent for the qualitative and quantitative analysis of chloride ions, forming a characteristic white precipitate of silver chloride.
- Argentic nitrate: A less common synonym emphasizing the silver content (from Latin for silver).
- AgNO₃: The standard chemical formula representing the compound.
- Lunar caustic (historical/contextual)
- Argentic nitrate (technical)
- Silver nitrate stain: A technique in histology (microscopic anatomy) to stain certain tissue components, like reticular fibers.
- Silver nitrate stick: A medical applicator, often a wooden stick coated with silver nitrate, used for cauterization and topical antibacterial treatment.
The definition of "silver nitrate" is highly specific and technical. Its core meaning is the chemical compound itself. Its usage is almost entirely defined by its functional applications: 1. Photographic Agent: Its primary historical use was in creating the light-sensitive halide crystals (e.g., silver bromide) in photographic film and paper emulsions. 2. Medical Cauterant: It is used to chemically burn (cauterize) tissue, such as to stop minor bleeding or remove small growths. 3. Topical Antiseptic: Its ability to kill microorganisms makes it useful, particularly in dilute solutions, for preventing infection in wounds and burns (e.g., in neonatal eye care to prevent ophthalmia neonatorum). 4. Laboratory Reagent: It is a fundamental chemical used in numerous analytical tests and synthetic procedures in chemistry.
- a nitrate used in making photographic emulsions; also used in medicine as a cautery and as a topical antibacterial agent