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7550-35-8

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Identification

Name
Lithium bromide
CAS
7550-35-8
Synonyms
LITHIUM BROMIDE
LITHIUM HALIDE
Hydrobromic acid lithium salt
LiBr
Lithium bromide (LiBr)
lithiumbromide(libr)
Lithiumbromide,dihydrate
lithiummonobromide
Lithiumbromidewhitepowder
LITHIUM BROMIDE, ANHYDROUS, BEADS,-10 M ESH, 99.9+%
LITHIUM BROMIDE, 99.995+%
LITHIUM HALIDE, MINIMUM MELTING COMPOSIT ION (CA. 68.5 WT. % LIBR)
LITHIUM BROMIDE REAGENTPLUS(TM) >=99%
LITHIUM BROMIDE 1.5 M IN TETRAHYDROFURAN
LITHIUM BROMIDE, POWDER
LITHIUM BROMIDE EXTRA PURE
LITHIUM BROMIDE, ANHYDROUS, BEADS,-10 MESH, 99.999% METALS BASIS
LITHIUM BROMIDE, REAGENTPLUS, >=99%
LITHIUM BROMIDE, 54 WT. % SOLUTION IN WA TER
LithiumBromideSolution55%
EINECS(EC#)
231-439-8
Molecular Formula
BrLi
MDL Number
MFCD00011077
Molecular Weight
86.85
MOL File
7550-35-8.mol

Chemical Properties

Appearance
White powder
Melting point 
550 °C (lit.)
mp 
550 °C(lit.)

Boiling point 
1265 °C
bp 
1265 °C
density 
1.57 g/mL at 25 °C

Fp 
1265°C
storage temp. 
Store at RT
form 
powder

color 
White
Specific Gravity
3.464
Stability:
Stable. Anhydrous form is extremely hygroscopic.
Water Solubility 
61 g/100 mL (25 º C)
Sensitive 
Hygroscopic
Merck 
14,5526
CAS DataBase Reference
7550-35-8(CAS DataBase Reference)
NIST Chemistry Reference
Lithium bromide(7550-35-8)
EPA Substance Registry System
7550-35-8(EPA Substance)

Safety Data

Hazard Codes 
Xn,Xi,F+
Risk Statements 
R22:Harmful if swallowed.
R36/37:Irritating to eyes and respiratory system .
R12:Extremely Flammable.
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
RIDADR 
UN 2056 3/PG 2
WGK Germany 
2

RTECS 
OJ5755000


3
TSCA 
Yes
HS Code 
28275900

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Questions And Answer

Description
Lithium bromide (LiBr) is the chemical compound of lithium and bromine. It has extreme hygroscopic, making it a suitable desiccant in the air conditioning systems. It can also be used in absorption chilling together with water. It is also useful in the organic synthesis such as forming adduct with some pharmaceuticals. In medical fields, it can be used as a sedative and used for the treatment of bipolar disorder. It can be manufactured by the treatment of lithium carbonate with hydrobromic acid. 
Physical properties
Lithium bromide is a white, crystalline, deliquescent solid. Aqueous solutions of lithium bromide have unusually low water vapor pressures. The following hydrates are formed: LiBr·H2O, LiBr-2H2O, LiBr-3H2O and LiBr-5H2O. All hydrates have incongruent melting points. Concentrated aqueous solutions of lithium bromide can dissolve significant quantities of polar organic substances such as cellulose. Lithium bromide, like lithium chloride, is soluble in polar organic solvents such as alcohols.
Lithium bromide
Uses
Lithium bromide is used in absorption, refrigeration and air-conditioning systems. A highly concentrated solution of the salt is an efficient absorbent of water vapor. The vapor pressure of such solution is very low. Other applications include the use of the salt as a swelling agent for wool, hair and other organic fibers; as a catalyst in dehydrohalogenation reactions; and as a sedative and hypnotic in medicine.
Preparation
Lithium bromide is prepared by neutralizing lithium hydroxide or lithium carbonate with an aqueous solution of hydrobromic acid, followed by concentration and crystallization:
LiOH + HBr → LiBr + H2O
Li2CO3 + HBr → LiBr + CO2 + H2O
The salt is usually obtained as hydrates. Anhydrous lithium bromide is obtained by heating hydrated salt under vacuum.

Hazard Information

Chemical Properties
White cubic crystals; hygroscopic; refractive index 1.784; density 3.464 g/cm3; melts at 550°C; vaporizes at 1,265°C; highly soluble in water (145g/100g at 4°C), much greater solubility in hot water (254g/100g at 90°C); soluble in methanol, ethanol and ether; slightly soluble in pyridine; vapor pressure of aqueous solutions at 52 and 68% concentrations at 25°C are 5 and 0.7 torr, respectively.
Definition
ChEBI: A lithium salt in which the counterion is bromide. The anhydrous salt forms cubic crystals similar to common salt.
Purification Methods
Crystallise it several times from water or EtOH, then dry it under high vacuum for 2 days at room temperature, followed by drying at 100o. Its solubility in H2O is 167% at ~20o, and 250% at ~100o. It is deliquescent and should be stored in a tightly stoppered vessel.

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