4,5-Dibromo-1,2-benzenediol

CAS NO.：2563-26-0
Empirical Formula: C6H4Br2O2
Molecular Weight: 267.9
MDL number: MFCD00233157
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 05:26:41

What is 4,5-Dibromo-1,2-benzenediol ?

The Uses of 4,5-Dibromo-1,2-benzenediol

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%).
Synthesis_2563-26-0

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

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 information for 4,5-Dibromo-1,2-benzenediol

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.