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Potassium bromide

Potassium bromide Structure
CAS No.
7758-02-3
Chemical Name:
Potassium bromide
Synonyms
KBr;BROMINE WATER;BROMINE TS;Kaliumbromid;Battery Grade;BROMINE LIQUID;Potassium bromide (KBr);ACS， 99% min;KALII BROMIDUM;BROMIDE BROMATE
CBNumber:
CB2854302
Molecular Formula:
BrK
Molecular Weight:
119
MOL File:
7758-02-3.mol
MSDS File:
SDS
Modify Date:
2024/8/5 20:55:42
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Potassium bromide Properties

Melting point 734 °C (lit.)
Boiling point 1435 °C/1 atm (lit.)
Density 3.119 g/mL at 25 °C(lit.)
vapor density 7.14 (vs air)
vapor pressure 175 mm Hg ( 20 °C)
refractive index 1.559
Flash point 1435°C
storage temp. Store at +5°C to +30°C.
solubility H2O: 1 M at 20 °C, clear, colorless
form random crystals
Specific Gravity 2.75
color White
PH 5.0-8.8 (25℃, 50mg/mL in H2O)
Water Solubility 650 g/L (20 ºC)
Sensitive Hygroscopic
λmax λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
Merck 14,7618
Dielectric constant 4.8700000000000001
Stability Stable. Incompatible with strong oxidizing agents, strong acids, bromine trifluoride and bromine trichloride.
InChIKey IOLCXVTUBQKXJR-UHFFFAOYSA-M
LogP 1 at 25℃
CAS DataBase Reference 7758-02-3(CAS DataBase Reference)
NIST Chemistry Reference Potassium bromide(7758-02-3)
EPA Substance Registry System Potassium bromide (7758-02-3)

SAFETY

Risk and Safety Statements

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H319
Precautionary statements  P280-P305+P351+P338-P337+P313
Hazard Codes  Xi
Risk Statements  36/37/38-36
Safety Statements  26-45-61-7/9-39-36
RIDADR  UN 1744 8/PG 1
WGK Germany  2
RTECS  TS7650000
F  3-10
TSCA  Yes
HS Code  28275100
Toxicity LD50 orally in Rabbit: > 2000 mg/kg
NFPA 704
0
1 0

Potassium bromide price More Price(77)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich(India) P9881 Potassium bromide ReagentPlus?, ≥99.0% 7758-02-3 500G ₹4611.45 2022-06-14 Buy
Sigma-Aldrich(India) P9881 Potassium bromide ReagentPlus?, ≥99.0% 7758-02-3 1KG ₹7328.53 2022-06-14 Buy
Sigma-Aldrich(India) P0838 Potassium bromide BioXtra, ≥99.0% 7758-02-3 250G ₹8140.4 2022-06-14 Buy
Sigma-Aldrich(India) P0838 Potassium bromide BioXtra, ≥99.0% 7758-02-3 1KG ₹18781.38 2022-06-14 Buy
Sigma-Aldrich(India) 746444 Potassium bromide anhydrous, free-flowing, Redi-Dri?, ACS reagent, ≥99% 7758-02-3 100G ₹2327.38 2022-06-14 Buy
Product number Packaging Price Buy
P9881 500G ₹4611.45 Buy
P9881 1KG ₹7328.53 Buy
P0838 250G ₹8140.4 Buy
P0838 1KG ₹18781.38 Buy
746444 100G ₹2327.38 Buy

Potassium bromide Chemical Properties,Uses,Production

Chemical Properties

Potassium bromide is a white or colourless crystalline solid with a pungent strong bitter and saline taste, slightly hygroscopic and soluble in water and very slightly soluble in ethanol and ether; cubic; r.d. 2.75; m.p. 734°C; b.p. 1435°C. Potassium bromide maybe prepared by the action of bromine on hot potassium hydroxide solutionor by the action of iron(III) bromideor hydrogen bromide on potassium carbonate solution. It is used widely in the photographic industry and is also used as a sedative. Because of itsrange of transparency to infrared radiation,KBr is used both as a matrix for solid samples and as a prism materialin infrared spectroscopy.

Uses

Potassium bromide was used as a secondary halide in combination with an iodide in the paper negative processes, the albumen on glass process, and the wet collodion processes. When silver bromide gelatin emulsion was invented, potassium bromide was the primary halide. It was also used in combination with either bichloride of mercury, copper sulfate, or potassium ferricyanide in photographic bleaches and as a restrainer in alkaline developers used for gelatin plates and developing-out papers.

Definition

ChEBI: Potassium bromide is a metal bromide salt with a K(+) counterion. It is used in the manufacture of photographic film, developer, film thickener, toner and color photo bleach.

Application

Potassium bromide is widely used in optics because KBr has a low refractive index and a wide spectral range into the infrared with nearly no absorption. As a result, KBr is widely used as infrared optical windows, as infrared beamsplitters, and as substrates for interferometers. Commonly KBr is used in transmission infrared spectroscopy as a media for powder samples. The KBr and powder are ground together and pressed, using a die, into a thin disc under vacuum. The disc suspends the sample without contributing to the transmitted signal. Potassium bromide has also been used in synthesis, commonly as a source of bromide ions. For example, double displacement of KBr and bismuth nitrate yielded nanosheets of bismuth oxybromide. Solutions of KBr have also been found to be useful shape-control agents or crystal-habit modifiers in formation of metal nanocrystals, including palladium nanorods and bimetallic platinum-paladium nanocrystals. KBr is a common source of bromide ions used as nucleophiles in organic chemistry.

Preparation

Potassium bromide was produced by the action of bromine on hot potassium hydroxide solution or Reacting elemental bromine with potassium hydroxide or potassium iodide will produce the potassium bromide salt:
KOH + Br2 → KBr + HOBr
KI + Br2 → KBr + I2
The reaction of bromine with potassium carbonate and urea is the basis of the process. The first step of the process involves the addition of K2SO4 to the potassium carbonate solution, followed by heating to 80 °C. After the lead-containing precipitate is removed by filtration, the bromine and urea are added, and the temperature and pH are adjusted to 30 °C and 6.0-6.5, respectively. Potassium bromide is recovered by recrystallization after reduction of volume of the reacting solution by evaporation. The sulfate can be removed from the solution by addition of BaBr2.

General Description

Potassium bromide is a white salt that crystallizes in the cubic rock salt structure, like sodium chloride. KBr is hygroscopic, deliquescent, highly soluble in water, and soluble in some polar organic solvents like glycerol, ethylene glycol, liquid ammonia, and hot ethanol, but insoluble in acetone. Aqueous solutions are neutral (pH about 7). When dissolved, KBr dissociates completely into its ions, making it a useful source of bromine ions in double displacement reactions or salt metathesis reactions. For example, this property was used in the production photographic films of silver bromide: KBr was reacted with silver nitrate to precipitate silver bromide, a salt that decomposes on exposure to light.

Air & Water Reactions

Water soluble.

Reactivity Profile

Potassium bromide is not in generally strongly reactive. A weak reducing agent, incompatible with oxidizing agents. Also incompatible with salts of mercury and silver. Violent reactions occur with bromine trifluoride. May react with nitrous ether spirit, many alkaloidal salts and starch. May also react with acids . Reacts with concentrated sulfuric acid to generate fumes of hydrogen bromide.

Hazard

Toxic by ingestion and inhalation

Fire Hazard

Flash point data for Potassium bromide are not available; however, Potassium bromide is probably nonflammable.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Large doses can cause central nervous system depression. Prolonged inhalation may cause skin eruptions. Mutation data reported. Violent reaction with BrF3. When heated to decomposition it emits toxic fumes of K2O and Br-. See also BROMIDES.

Purification Methods

Crystallise the bromide from distilled water (1mL/g) between 100o and 0o. Wash it with 95% EtOH, followed by Et2O. Dry it in air, then heat it at 115o for 1hour, pulverize it, then heat it in a vacuum oven at 130o for 4hours. It has also been crystallised from aqueous30% EtOH, or EtOH, and dried over P2O5 under vacuum before heating in an oven.

Potassium bromide Preparation Products And Raw materials

Raw materials

Ampicillin Potassium hydroxide Potassium carbonate 2,3-DICHLORO-5,8-DIHYDROXY-1,4-NAPHTHOQUINONE Urea
Hydrogen bromide Government regulation
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Preparation Products

5-Bromo-2-oxindole 4-BROMOMETHYLTETRAHYDROPYRAN Hydroxyacetone 1 10-PHENANTHROLINE-5 6-DIONE 97 MORPHOLINE-3,4-DICARBOXYLIC ACID 4-TERT-BUTYL ESTER
Cyclopropanecarboxaldehyde DL-Threonine Potassium bromate 3-Bromo-7-(trifluoromethyl)imidazo[1,2-a]pyrimidine Beclobrate
Cuprous bromide 1,1-diethoxyethylene Tazobactam acid MERCURIC BROMIDE 3-Bromobenzophenone
mercurous bromide 4-Bromobenzyl bromide (S)-4-BOC-MORPHOLINE-3-CARBOXYLIC ACID trans,trans-Muconic acid 4-Phenoxy-2,6-Diisopropyl Aniline
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Potassium bromide Suppliers

Global( 644)Suppliers
Supplier Tel Country ProdList Advantage Inquiry
Calibre Chemicals Pvt. Limited +91-9930991722 +91-9930991722 Gujarat, India 8 58 Inquiry
Eskay Iodine Pvt Ltd +91-22-6622 7575 Mumbai, India 28 58 Inquiry
Yogi Dye Chem Industries +91-9821098577 +91-9821098577 Mumbai, India 124 58 Inquiry
S.V ENTERPRISES +919322701159 Mumbai, India 150 58 Inquiry
ALLIPO CHEMICALS +91-8238998187 +91-8238998187 Gujarat, India 32 58 Inquiry
Evans Fine Chem +91-9821340302 +91-9821340302 Maharashtra, India 286 58 Inquiry
SHRI LAXMI CHEMICALS +91-7046525088 +91-8200315284 Ahmedabad, India 45 58 Inquiry
Bhavika Chemicals Corporation +91-9867153307 +91-9867153307 Maharashtra, India 31 58 Inquiry
Kronox Lab Sciences Pvt Ltd +91-9313231074 +91-9313231074 Gujarat, India 240 58 Inquiry
Dhara Industries +91-9322395199 +91-9322395199 Mumbai, India 190 58 Inquiry
Supplier Advantage
Calibre Chemicals Pvt. Limited 58
Eskay Iodine Pvt Ltd 58
Yogi Dye Chem Industries 58
S.V ENTERPRISES 58
ALLIPO CHEMICALS 58
Evans Fine Chem 58
SHRI LAXMI CHEMICALS 58
Bhavika Chemicals Corporation 58
Kronox Lab Sciences Pvt Ltd 58
Dhara Industries 58

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