1,4-Dibromobenzene Property

Melting point:

83-87 °C (lit.)

Boiling point:

219 °C (lit.)

Density 

1.841 g/mL at 25 °C (lit.)

vapor pressure 

0.134 at 35 °C (Hine et al., 1963)

refractive index 

1.5742

Flash point:

219-220°C

storage temp. 

Inert atmosphere,Room Temperature

solubility 

Soluble in alcohol, benzene, chloroform, toluene and carbon tetrachloride. Insoluble in ether.

form 

Crystals

color 

Colorless to almost white

Water Solubility 

practically insoluble

λmax

282nm(EtOH)(lit.)

Merck 

14,3019

BRN 

1904543

Henry's Law Constant

5.0 x 10^-4 atm?m³/mol at 25 °C (Hine and Mookerjee, 1975)

Dielectric constant

8.8（20℃）

Stability:

Stable. Combustible. Incompatible with strong oxidizing agents.

InChIKey

SWJPEBQEEAHIGZ-UHFFFAOYSA-N

CAS DataBase Reference

106-37-6(CAS DataBase Reference)

NIST Chemistry Reference

Benzene, 1,4-dibromo-(106-37-6)

EPA Substance Registry System

p-Dibromobenzene (106-37-6)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

24/25-36-26

RIDADR 

UN 2711

WGK Germany 

2

RTECS 

CZ1791000

TSCA 

Yes

HazardClass 

9

PackingGroup 

III

HS Code 

29036990

Hazardous Substances Data

106-37-6(Hazardous Substances Data)

Toxicity

Acute oral LD₅₀ for mice 120 mg/kg (quoted, RTECS, 1985).

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P302+P352IF ON SKIN: wash with plenty of soap and water.

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

1,4-Dibromobenzene Chemical Properties,Usage,Production

Chemical Properties

1,4-dibromobenzene is a dibromobenzene. It is a white or off-white powder. freely soluble in hot ethanol, acetone, ether and hot benzene, soluble in ethanol and benzene, insoluble in water. It has a strong smell similar to that of the lighter chlorine analogue. It can be used as a precursor to the dye 6,6-Dibromoindigo.

Chemical Properties

Dibromobenzene is a heavy colorless liquid. Pleasant aromatic odor.

Uses

Solvent for oils; ore flotation; motor fuels; organic synthesis.

Uses

1,4-Dibromobenzene is used in the synthesis of 2,5-dibromoacetophenone, triarylamines and trans- stilbenes. It is widely used as a heavy liquid solvent as well as a motor oil additive. It finds application as an intermediate in the manufacture of organic chemicals such as dyes, pharmaceuticals and flame retardants for polymeric materials.

Definition

ChEBI: 1,4-dibromobenzene is a dibromobenzene.

Potential Exposure

Dibromobenzene is used as a solvent for oils and in organic synthesis.

Shipping

UN1993 Flammable liquids, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid, Technical Name Required. UN2514 Bromobenzene, Hazard Class: 3; Labels: 3-Flammable liquid.

Purification Methods

Steam distil the dibromobenzene , then crystallise it from EtOH or MeOH and dry it in the dark under vacuum. Purify it by zone melting. [Beilstein 5 IV 683.]

Incompatibilities

Extremely flammable. May form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, and epoxides.

Waste Disposal

Use a licensed professional waste disposal service to dispose of this material. All federal, state, and local environmental regulations must be observed. Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Incineration with flue gas scrubbing.