4,5-Dibromo-1,2-benzenediol Chemical Properties

Melting point:

111-116°C (lit.)

Boiling point:

328.5±37.0 °C(Predicted)

Density 

2.257±0.06 g/cm3(Predicted)

storage temp. 

Sealed in dry,Room Temperature

form 

powder, crystals or chunks

pka

7.98±0.23(Predicted)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

4,5-Dibromo-1,2-benzenediol Usage And Synthesis

Uses

4,?5-?Dibromobenzene-?1,?2-?diol is a dye. Dyes and metabolites.

Synthesis

4,5-Dibromo-1,2-benzenediol is obtained by reacting catechol with Bromine in CCl4.
Experimental procedure￡oIn a 500mL three neck round bottom flask under nitrogen, equipped with a refluxcondenser, an addition funnel and a gas outlet connected to a bubbler filled with a 10%NaOH aqueous solution, was suspended catechol (136 mmol, 15.0 g, 1 eq.) in CCl4 (150mL). Bromine (272 mmol, 43.5 g, 2 eq.) diluted in CCla(20mL) was added dropwise at 0?? over 4.5 h. The excess of bromine was neutralized with aqueous NaHSO4 (150mL,40% solution). The mixture was filtrated and the solids were dissolved in CCLa,washed with water and dried in vacuum. The obtained 4,5-dibromocatechol (30.2 g)was then recrystallized from CHCl3 (220 mL) to afford a white crystalline solid (22.5 g,62%).

4,5-Dibromo-1,2-benzenediol (2563-26-0)Related Product Information

• 1,3-Dibromo-5,5-dimethylhydantoin
• 1,3-Dibromobenzene
• 4-tert-Butylcatechol
• 2,4-DIBROMOBIPHENYL
• Bromoxynil
• 1,2-Dibromopropane
• 1,4-Dibromobenzene
• 4-Bromophthalic acid
• 1,2-Dibromobenzene
• Catechol
• Pyrocatechol Violet
• 4-Fluorocatechol
• 3-Bromoanisole
• 4'-Bromopropiophenone
• 4,5-DIBROMOVERATROLE
• bibrocathol
• 1,2-DIBROMO-4,5-(METHYLENEDIOXY)BENZENE
• tert-Butylcatechol