ChemicalBook--->CAS DataBase List--->2563-26-0

2563-26-0

2563-26-0 Structure

2563-26-0 Structure
IdentificationBack Directory
[Name]

4,5-Dibromo-1,2-benzenediol
[CAS]

2563-26-0
[Synonyms]

NSC10858
550248_SIAL
ZINC00254871
4,5-dibromopyrocatechol
4,5-Dibromo-1,2-Benzenediol
1,2-BENZENEDIOL,4,5-DIBROMO-
Benzen-1,2-diol, 4,5-dibromo-
Pinaverium Bromide Impurity 8
4 5-DIBROMOBENZENE-1 2-DIOL 90% TECH
4,5-DIBROMOBENZENE-1,2-DIOL, 90% tech grade
4,5-Dibromobenzene-1,2-diol 90%, technical grade
[Molecular Formula]

C6H4Br2O2
[MDL Number]

MFCD00233157
[MOL File]

2563-26-0.mol
[Molecular Weight]

267.9
Chemical PropertiesBack Directory
[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
[pka]

7.98±0.23(Predicted)
Safety DataBack Directory
[Hazard Codes ]

Xi
[Risk Statements ]

36/37/38
[Safety Statements ]

26-36
[WGK Germany ]

3
Hazard InformationBack Directory
[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:In 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%).
Spectrum DetailBack Directory
[Spectrum Detail]

4,5-Dibromo-1,2-benzenediol(2563-26-0)IR
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