Iodine monobromide Property

Melting point:

42-50 °C (lit.)

Boiling point:

116 °C

Density 

4.416 g/mL at 25 °C (lit.)

Flash point:

116°C

storage temp. 

2-8°C

solubility 

Aqueous Base (Slightly), Methanol (Slightly), Water (Slightly)

form 

Solution

color 

Dark red

Specific Gravity

4.4157

PH

<1 (H2O, 20°C)

Water Solubility 

Soluble in water, alcohol, ether, carbon disulfide and glacial acetic acid.

Sensitive 

Moisture & Light Sensitive

Merck 

14,5016

BRN 

3902973

Stability:

Light Sensitive

CAS DataBase Reference

7789-33-5(CAS DataBase Reference)

EPA Substance Registry System

Iodine bromide (IBr) (7789-33-5)

Safety

Hazard Codes 

C

Risk Statements 

34-35-10-40-20/21/22-67-37

Safety Statements 

26-36/37/39-45-28-27

RIDADR 

UN 3264 8/PG 2

WGK Germany 

3

F 

1-8

TSCA 

Yes

HS Code 

3822 00 00

HazardClass 

8

PackingGroup 

II

Hazardous Substances Data

7789-33-5(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

H335May cause respiratory irritation

Precautionary statements

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

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Iodine monobromide Chemical Properties,Usage,Production

Chemical Properties

A dark grey to brownish-black crystalline mass that can be dissolved in ethanol, ether, chloroform, carbon disulphide, and other solvents. When it is heated, it becomes partially dissociated. It can prepared by the action of iodine with bromine in a stream of nitrogen. It is used in organic synthesis.

Uses

Iodine monobromide is used as an electrophile employed in a new synthetic approach to polyketide structural units. It is also used in iodometry and serves as a source of I+. It is a powerful iodinating agent used in organic synthesis as well as involved in the synthesis of radioiodinated fatty acids for heart imaging.

Preparation

Prepared from the elements, excess Br is removed by heating to 50 °C in a current of CO2.

Hazard

Toxic by ingestion and inhalation, vapors corrosive to tissue.

Health Hazard

Vapors of iodine monobromide are irritatingto the skin, eyes, and mucous membranes.Its concentrated solutions are corrosive to theskin. Toxicity data for this compound are notavailable.

Fire Hazard

Noncombustible solid. The molten salt ex plodes when mixed with potassium, and ignites with finely divided aluminum. Its mixture with sodium explodes on impact. The reaction of phosphorus with molten salt is violent.

Purification Methods

The brown-black crystals are purified by repeated fractional crystallisation from its melt. The vapour dissociates on heating [Yost et al. J Amer Chem Soc 55 552 1933, Schmeisser in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I pp 291-292 1963].

Precautions

corrosive solid and vapor; readily absorbed through skin and mucous membranes; use in a fume hood and wear gloves and appropriate protective clothing; air-, moisture-, and light-sensitive; should be stored refrigerated (under N2) in a tightly sealed amber bottle. Forms explosive mixtures with potassium and sodium, and reacts extremely exothermically with phosphorus and tin.