Silberbromid

Bezeichnung:Silberbromid

CAS-Nr7785-23-1

Englisch Name:SILVER BROMIDE

CBNumberCB5359545

SummenformelAgBr

Molgewicht187.77

MOL-Datei7785-23-1.mol

Synonyma

Silberbromid

Silberbromid physikalisch-chemischer Eigenschaften

Schmelzpunkt	432 °C (lit.)
Siedepunkt	700 °C
Dichte	6.473 g/mL at 25 °C (lit.)
storage temp.	Room Temperature
Löslichkeit	insoluble in H2O, acid solutions, ethanol
Aggregatzustand	Powder
Wichte	6.473
Farbe	Pale Yellow
Wasserlöslichkeit	soluble in alkali cyanide solutions. Partially soluble in ammonia. Insoluble in alcohol and acids. Practically insoluble in water.
Sensitive	Light Sensitive
Crystal Structure	Cubic, Sphalerite Structure - Space Group F(-4)3m
Merck	14,8506
Solubility Product Constant (Ksp)	pKsp: 12.3（25°C）
Dielectric constant	12.2（0.0℃）
Stabilität	Stability Darkens in light
InChIKey	ADZWSOLPGZMUMY-UHFFFAOYSA-M
CAS Datenbank	7785-23-1(CAS DataBase Reference)
EPA chemische Informationen	Silver bromide (AgBr) (7785-23-1)

Sicherheit

Kennzeichnung gefährlicher	Xi
S-Sätze:	22-24/25
WGK Germany	3
F	8
Hazard Note	Irritant
TSCA	Yes
HazardClass	9
HS Code	2843290000

Gefahreninformationscode (GHS)

SILVER BROMIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
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.
Physikalische Eigenschaften
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.
Verwenden
In photography.
Verwenden
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.
Verwenden
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. It 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.
synthetische
Silver bromide is prepared by double decomposition reaction. An aqueous solution of alkali bromide, such as sodium or potassium bromide, is slowly added to an aqueous solution of silver nitrate:
Ag+ (aq) + Brˉ (aq) → AgBr(s)
The precipitate is washed repeatedly with hot water. Preparation should be in a dark room under a ruby red light.
Flammability and Explosibility
Non flammable
läuterung methode
It is insoluble in dilute HNO3 or dilute NH3 but is soluble in conc NH3. Store it in the dark.

SILVER BROMIDE Upstream-Materialien And Downstream Produkte

Silberbromid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

7785-23-1, SILVER BROMIDE Verwandte Suche:

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