THALLIUM(I) BROMIDE Property

Melting point:

>300 °C(lit.)

Boiling point:

815 °C

Density 

7.5 g/mL at 25 °C(lit.)

form 

Powder

Specific Gravity

7.557

color 

yellow

Water Solubility 

Practically insoluble in water

Sensitive 

Hygroscopic

Merck 

14,9258

Solubility Product Constant (Ksp)

pKsp: 5.43

Exposure limits

ACGIH: TWA 0.02 mg/m3 (Skin)

CAS DataBase Reference

7789-40-4(CAS DataBase Reference)

EPA Substance Registry System

Thallium bromide (TlBr) (7789-40-4)

Safety

Hazard Codes 

T+,N

Risk Statements 

26/28-33-51/53

Safety Statements 

13-28-45-61

RIDADR 

UN 1707 6.1/PG 2

WGK Germany 

3

RTECS 

XG3850000

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

28275900

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H373May cause damage to organs through prolonged or repeated exposure

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P273Avoid release to the environment.

P314Get medical advice/attention if you feel unwell.

THALLIUM(I) BROMIDE Chemical Properties,Usage,Production

Crystal System

The space lattice of TlBr belongs to the cubic system, and its cesium chloride-type structure has a lattice constant of a=0.397 nm.

Description

Thallium bromide is a yellow-white solid and hygroscopic. It is similar to silver bromide. It gets darker when light shines on it. It is very toxic, like all thallium compounds. It does not dissolve in water. Thallium bromide is used in gamma ray and x-ray detectors and also in semiconductors. Prolonged period of exposure to thallium compounds has been reported to cause adverse health effects such as joint pain, severe pain in legs, loss of appetite, fatigue, and albuminuria.

Chemical Properties

THALLIUM(I) BROMIDE is yellow crystalline powder

Uses

Thallium(I) bromide is used as Chemical reagents and pharmaceutical intermediates.

Uses

THALLIUM(I) BROMIDE is used for mixed crystals with thallium iodide for infrared radiation transmitters used in military detection devices.

Production Methods

Single crystals are synthesized by the Stockbarger method after putting high grade sources into a well dried alumina crucible. The crystal is easy to process according to its nonfragile character.

Safety Profile

Poison by ingestion and subcutaneous routes. Reacts violently with Na, K. When heated to decomposition it emits very toxic fumes of Brand T1. See also BROMIDES and THALLIUM COMPOUNDS.

Purification Methods

Thallous bromide (20g) is purified by refluxing for 2-3hours with water (200mL) containing 3mL of 47% HBr. It is then washed until acid-free, heated to 300o for 2-3hours and stored in brown bottles. It solubility in H2O (w/w) is 0.034% at 0o, 0.048% at 20o, and 0.204% at 100o. [D.nges in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 870 1963]. POISONOUS.