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Potassium bromide

Description Uses Spectrum purity Preparation Toxicity
Potassium bromide
Potassium bromide
Chemical Name:
Potassium bromide
Molecular Formula:
Formula Weight:
MOL File:

Potassium bromide Properties

Melting point:
734 °C(lit.)
Boiling point:
58.8 °C(lit.)
3.119 g/mL at 25 °C(lit.)
vapor density 
7.14 (vs air)
vapor pressure 
175 mm Hg ( 20 °C)
refractive index 
Flash point:
storage temp. 
H2O: 1 M at 20 °C, clear, colorless
random crystals
5.0-8.8 (25℃, 50mg/mL in H2O)
Water Solubility 
650 g/L (20 ºC)
Stable. Incompatible with strong oxidizing agents, strong acids, bromine trifluoride and bromine trichloride.
CAS DataBase Reference
7758-02-3(CAS DataBase Reference)
NIST Chemistry Reference
Potassium bromide(7758-02-3)
EPA Substance Registry System
Potassium bromide (KBr)(7758-02-3)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
HS Code  28275100
Hazardous Substances Data 7758-02-3(Hazardous Substances Data)
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P405 Store locked up.

Potassium bromide price More Price(67)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.04904 Potassium bromide 99.999 Suprapur 7758-02-3 1EA $391 2017-11-08 Buy
Sigma-Aldrich 1.04904 Potassium bromide 99.999 Suprapur 7758-02-3 2EA $1061 2017-11-08 Buy
Alfa Aesar 10837 Potassium bromide, Puratronic?, 99.999% (metals basis) 7758-02-3 10g $89.2 2017-11-08 Buy
Alfa Aesar 10837 Potassium bromide, Puratronic?, 99.999% (metals basis) 7758-02-3 50g $302 2017-11-08 Buy
Sigma-Aldrich 1.04905 Potassium bromide for analysis (max. 0,000001% Hg) EMSURE ACS,Reag. Ph Eur 7758-02-3 1EA $88.5 2017-11-08 Buy

Potassium bromide Chemical Properties,Uses,Production


Potassium bromide can be used as analytical reagents and developers, but also for the pharmaceutical industry.
It can be used as the emulsion reagents for the filmstrip and photo film; used for formulating developer, used as a sedative in medical treatment.
In photographic materials, Potassium bromide is used in the manufacture of photographic film, developer, film thickener, toner and color photo bleach. In medication, it is used as nerve tranquilizers (tribromide). In addition, it is also used for chemical analysis reagents, the transmission of the spectra and infrared ray, for making special soap as well as being used in sculpture, lithography and so on.
It can be used for the preforming in the infrared test.


Industry Application Role/benefit
Photography Preparation of developing agent Restrainer/ improves differentiation between exposed and unexposed crystals of silver halide, and thus reduces fog
Print developing solution Alkaline accelerator/increases the printing density of thin negatives
Optics Infrared spectroscopy Sample carrier/has no significant optical absorption lines in its high transmission region
Human medicine Treatment of epileptic and seizure disorders Effective component/anti-convulsant and sedative activity
Veterinary Treatment of seizures in dogs, cats,etc. Effective component/anti-convulsant and sedative activity
Chemical analysis Titration determination of copper and silver Titration agent
Polarographic analysis of indium, cadmium and arsenic Analytical agent
Removal of peripheral membrane proteins

Spectrum purity

For IR detection; used for infrared sample preparation;
Solubility (g/100ml)
0 ° C to 53.6 g; 10 ° C to 59.5 g; 20 ° C to 65.3 g; 30 ° C to 70.7 g; 40 ° C to 75.4 g
60 ° C to 85.5 g; 80 ° C to 94.9 g; 90 ° C to 99.2 g; 100 ° C to 104 g.


The bromide is first reacted with scrap iron to obtain the Fe3Br8 • 16H2O, followed by reaction with the boiling potassium carbonate solution. Fe3Br8 • 16H2O + K2CO3-boiling heat-> 8KBr + Fe3O4 + 4CO2 + 16H2O, the Fe3O4 is filtered, followed by concentration to obtain potassium bromide.
Urea reduction method: send the caustic potassium solution dissolved with urea caustic potassium solution sent to the reactor. Slowly add bromine at 80 ° C for reaction. The reaction is completed when the Ph value is 6-7. The reaction solution is added to the storage tank, subjecting to activated carbon decolorization. When the solution becomes clean, apply filtering, evaporation, crystallization, centrifugal separation and drying, that is the finished product of potassium bromide. Its reaction equation is:
3Br2 + 6KOH + CO (NH2) 2 → 6KBr + 5H2O + CO2 ↑ + N2 ↑


Avoid ingestion or inhalation; avoid eye and skin contact. Upon ingestion, head dizziness, nausea may occur. Immediately seek medical treatment; Upon inhalation, vomiting will happen, the patient should be immediately moved to place with fresh air and sent for medical treatment; if splashed into eyes, immediately rinse with a lot of fresh water for 2 0min; skin, upon being contact with potassium bromide, should also be subject to rinsing with plenty of water.


ChEBI: A metal bromide salt with a K(+) counterion.

General Description

Odorless colorless crystals or white crystalline powder or white granular solid with a pungent bitter saline taste. Aqueous solutions are neutral (pH about 7).

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.

Fire Hazard

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

Potassium bromide Preparation Products And Raw materials

Raw materials

Preparation Products

Potassium bromide Suppliers

Global( 253)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123
86-21-63290778 86-21-63218885 China 9988 79
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 China 25125 65
Weifang Kaihong Chemical Limited 86-536-8865335,13953637678
86-536-5310398 China 64 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96831 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40403 62
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
86-21-50328109 China 15950 69
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30314 84
Beijing dtftchem Technology Co., Ltd. 13651141086; 86(10)60275028、60275820
86 (10) 60270825 China 1443 62
BeiJing Hwrk Chemicals Limted 4006990298;010-57411839;0757-86311057;021-51691807
010-87653215;0757-86311057;021-55236763 China 15554 55
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44197 61

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