Quick Search
CAS NUMBER: 7785-23-1
EC NUMBER: 232-076-8
MOLECULAR FORMULA: AgBr
MOLECULAR WEIGHT: 187.77
Silver bromide (AgBr) is a soft, pale-yellow, water-insoluble salt well known (along with other silver halides) for its unusual sensitivity to light.
This property has allowed Silver bromides to become the basis of modern photographic materials.
Silver bromide is widely used in photographic films and is believed by some to have been used for making the Shroud of Turin.
Silver bromide can be found naturally as the mineral bromargyrite.
Silver bromide (AgBr), an important component of photographic film, is, like silver chloride and iodide, light sensitive.
Traces of Silver bromide are added to wheat flour to improve baking. Other bromine compounds of significance include hydrogen bromide (HBr), a colourless gas used as a reducing agent and a catalyst in organic reactions.
A solution of the gas in water is called hydrobromic acid, a strong acid that resembles hydrochloric acid in its activity toward metals and their oxides and hydroxides.
Silver Bromide is generally immediately available in most volumes.
High purity, submicron and nanopowder forms may be considered.
Most metal bromide compounds are water soluble for uses in water treatment, chemical analysis and in ultra high purity for certain crystal growth applications.
The bromide ion in an aqueous solution can be detected by adding carbon disulfide (CS2) and chlorine.
Silver Bromide is useful material for very deep IR applications where sensitivity to moisture is a problem.
Silver Bromide crystal growth was developed relatively recently by the standards of many IR materials.
The parameters of Silver Bromide have not been researched as thoroughly as those of Silver Chloride.
This soft crystal deforms under heat and pressure and can be forged in polished dies to create IR windows and lenses.
Silver bromide, AgBr, is pale yellow crystals or powder, that darken on exposure to light, finally turning black and soluble in potassium bromide, potassium cyanide, and sodium thiosulfate solutions, only very slightly soluble in ammonia water, insoluble in water, and light sensitive.
Derivation is through silver nitrate dissolving in water and a solution ofalkali bromide added slowly.
The precipitated silver bromide is washed repeatedly with hotwater.
The operation must be carried on in a darkroom under a ruby-red light.
Used in photographic film and plates, photochromic glass and as a laboratory reagent.
Silver bromide is an important light sensitive compound which is used in many photographic applications.
The chemical formula of silver bromide is AgBr and its molar mass is 187.77 g/mol.
Silver bromide is an inorganic compound made up of the silver metal (Ag) and the bromine atom (Br), held together through a polar covalent bond which has a strong ionic character.
Similar to the other silver halides, solid AgBr also has a face-centered cubic structure similar to that of NaCl.
Silver bromide occurs naturally as the mineral bromargyrite in considerable amounts.
However, Silver bromide is typically obtained in large amounts through chemical production.
Silver bromide is prepared industrially by the reaction between aqueous solutions of silver nitrate and potassium bromide.
The water-insoluble silver bromide product precipitates out at the end of the reaction, while the potassium nitrate by-product remains in the solution.
Silver bromide is characterized by its photosensitive property (absorbs energy from light).
Silver bromide reacts when exposed to light and turns grey or black.
Thus, Silver bromide needs to be stored in the dark.
Silver bromide reacts readily with liquid ammonia to form various amine complexes.
Silver bromide is a stable compound under normal conditions, but when heated to high temperatures, it decomposes with the release of toxic fumes of bromine.
Silver bromide is a chemical compound of silver and bromine that is found naturally as the mineral bromargyrite.
Silver bromide is used in black-and-white photography film and as a semiconductor.
Silver bromide is a halogen element with the symbol Br and atomic number 35.
Silver bromide does not occur naturally, but bromine salts can be found in crustal rock.
Silver bromide is a metallic element with the chemical symbol Ag and atomic number 47.
Silver bromide occurs naturally in its pure, free form, as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite.
USES:
A yellowish powder made by the combination of any soluble bromide with silver nitrate.
Silver bromide could also be formed by exposing metallic silver to the fumes of bromine as in the daguerreotype process.
Silver bromide is soluble in sodium thiosulfate, potassium bromide, and potassium cyanide solutions.
Silver bromides were secondary halides for the paper negative processes, albumen negative process, and wet or preserved collodion processes.
Silver bromides were the primary halides for the silver bromide collodion emulsion negative and the silver bromide gelatin emulsion processes.
Silver bromide is the most photosensitive silver halide.
Silver Bromide is used in the spectroscopic study of silver halides in montmorillonite and their antibacterial activity, also used in the antimicrobial compositions for use in wound care products.
Due to Silver bromides light sensitive nature, the main applications of silver bromide are in photography.
Silver bromide is used in photographic films and plates.
Silver bromide is also used for infrared applications, for light sensitive eyeglasses, and semiconductors.
Like some other silver halides, Silver bromide also has antiseptic properties and is used as a topical disinfectant and astringent.
APPLICATIONS:
Silver bromide is used as the light-sensitive component on ordinary photographic film and plates and also used in I.R. applications and ionic semiconductors.
- Artificial rainfall
- Photographic film
- Color changing lens
PROPERTIES:
-Quality Level: 100
-assay: 99%
-form: powder, crystals or chunks
-mp: 432 °C (lit.)
-density: 6.473 g/mL at 25 °C (lit.)
-SMILES string: Br[Ag]
-InChI: 1S/Ag.BrH/h;1H/q+1;/p-1
-InChI key: ADZWSOLPGZMUMY-UHFFFAOYSA-M
PHYSICAL PROPERTIES:
The larger halide ions are arranged in a cubic close-packing, while the smaller silver ions fill the octahedral gaps between them, giving a 6-coordinate structure where a silver ion Ag+ is surrounded by 6 Br− ions, and vice versa.
The coordination geometry for AgBr in the NaCl structure is unexpected for Ag(I) which typically forms linear, trigonal (3-coordinated Ag) or tetrahedral (4-coordinated Ag) complexes.
Unlike the other silver halides, iodargyrite (AgI) contains a hexagonal zincite lattice structure.
Yellow cubic crystals or powder; refractive index 2.253; darkens on exposure to light; Mohs hardness 2.5; density 6.47g/cm3; melts at 432°C; vaporizes at 1,502°C; insoluble in water, alcohol, and most acids; slightly soluble in dilute ammonia and ammonium carbonate solutions; sparingly soluble in concentrated ammonia solution (0.33 g/100mL 10% ammonia solution at 12°C);soluble in alkali cyanide solutions.
PREPARATION:
Although less convenient, Silver bromide can also be prepared directly from its elements.
Modern preparation of a simple, light-sensitive surface involves forming an emulsion of silver halide crystals in a gelatine, which is then coated onto a film or other support.
The crystals are formed by precipitation in a controlled environment to produce small, uniform crystals (typically < 1 μm in diameter and containing ~1012 Ag atoms) called grains.
SOLUBILITY:
Silver bromides have a wide range of solubilities.
The solubility of Silver bromide is about 6 × 107 times.
These differences are attributed to the relative solvation enthalpies of the halide ions; the enthalpy of solvation of fluoride is anomalously large
CHARACTERISTICS:
-Compound Formula: BrAg
-Molecular Weight: 187.77
-Appearance: White Powder
-Boiling Point: 1,502° C (2,736° F)
-Density 6.5 g/cm3
-Refractive Index: 2.3
-Specific Heat: 290 J/kg-K
-Thermal Conductivity: 1.2 W/m-K
-Thermal Expansion: 30 µm/m-K
-Young's Modulus: 32 GPa
-Exact Mass: 185.823431
-Monoisotopic Mass: 185.823431
CHEMICAL IDENTIFIERS:
-Linear Formula: AgBr
-MDL NumberLinear Formula: AgBr
-EC No.: 232-076-8
-Pubchem CID: 66199
-IUPAC Name: bromosilver
-SMILES: [Ag]Br
-InchI Identifier: InChI=1S/Ag.BrH/h;1H/q+1;/p-1
-InchI Key: ADZWSOLPGZMUMY-UHFFFAOYSA-M
CHEMICAL PROPERTIES:
-Formula: AgBr
-Formula Weight: 187.78
-Form: Powder
-Melting point: 432°
-Density: 6.47
-Storage & Sensitivity: Light Sensitive, Ambient temperatures.
SYNONYM:
7785-23-1
bromosilver
AgBr
Silver bromide (AgBr)
Bromargyrite (AgBr)
MFCD00003398
14358-95-3
AgBr Nanoparticles
EINECS 232-076-8
Silver bromide(agbr)
Silver bromide, 99%
Silver bromide, Premion?
Silver bromide, 99.5%
EC 232-076-8
DTXSID4064844
5438AF
AKOS015832919
Silver bromide, 99.998% (metals basis)
CS-0031746
D97766
Q407515
