RUBIDIUM BROMIDE Chemical Properties

Melting point:

693 °C

Boiling point:

1340 °C

Density 

3.35 g/mL at 25 °C (lit.)

refractive index 

1.5530

Flash point:

1340°C

form 

crystal

Specific Gravity

3.35

color 

white

Water Solubility 

Soluble in water

Sensitive 

Hygroscopic

Merck 

14,8283

Dielectric constant

4.8499999999999996

Dielectric constant

4.8499999999999996

Stability:

Stable. Incompatible with strong acids.

InChI

1S/BrH.Rb/h1H;/q;+1/p-1

InChIKey

JAAGVIUFBAHDMA-UHFFFAOYSA-M

SMILES

[Br-].[Rb+]

CAS DataBase Reference

7789-39-1(CAS DataBase Reference)

EPA Substance Registry System

Rubidium bromide (RbBr) (7789-39-1)

Safety Information

Safety Statements 

22-24/25

WGK Germany 

3

TSCA 

TSCA listed

HS Code 

2827590000

Storage Class

11 - Combustible Solids

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

RUBIDIUM BROMIDE Usage And Synthesis

Description

Rubidium bromide (RbBr) is a hygroscopic material, which is generally similar to the other rubidium halides.
Rubidium bromide is the bromide of rubidium. It has a NaCl crystal structure, with a lattice constant of 685 picometres.
There are several methods for synthesising rubidium bromide. One involves reacting rubidium hydroxide with hydrobromic acid:
RbOH + HBr → RbBr + H2O
Another method is to neutralize rubidium carbonate with hydrobromic acid:
Rb2CO3 + 2 HBr → 2 RbBr + H2O + CO2
Rubidium metal would react directly with bromine to form RbBr, but this is not a sensible production method, since rubidium metal is substantially more expensive than the carbonate or hydroxide; moreover, the reaction would be explosive.

Chemical Properties

white crystalline powder

Uses

Rubidium bromide is used in infrared optics.

Synthesis

There are many ways to synthesize rubidium bromide. One is the reaction of rubidium hydroxide with hydrogen bromide: RbOH + HBr → RbBr + H2O ;

Another method is to neutralize rubidium carbonate with hydrogen bromide: Rb2CO3 + 2HBr → 2RbBr + H2O + CO2

Purification Methods

The bromide is a white crystalline powder which crystallises from H2O (solubility: 50% in cold and 67% in boiling H2O to give a neutral solution). It also crystallises from near-boiling water (0.5mL/g) by cooling to 0o.

RUBIDIUM BROMIDE(7789-39-1)Related Product Information

• RUBIDIUM
• Sodium oxide
• ANTIMONY (IV) OXIDE
• BERYLLIUM OXIDE
• Magnesium fluoride
• Rubidium fluoride
• Rubidium nitrate
• Rubidium iodide
• Rubidium sulfate
• Rubidium carbonate
• Rubidium chloride
• Rubidium hydroxide
• RUBIDIUM PERCHLORATE
• 2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO RUBIDIUM
• RUBIDIUM ACETATE
• RUBIDIUM HYDROXIDE HYDRATE
• BROMIDE
• RUBIDIUM BROMIDE