Dibromophenols

The dibromophenols form a group of aromatic compounds that are derived from both phenol and bromobenzene or dibromobenzenes . The structure consists of a benzene ring with an attached hydroxyl group  (-OH) and two bromine atoms  (-Br) as substituents . Their different arrangement results in six constitutional isomers with the empirical formula C ₆ H ₄ Br ₂ O:

Dibromophenols
Surname	2,3-dibromophenol , 1,2-dibromo- 3-hydroxybenzene	2,4-dibromophenol , 1,3-dibromo- 6-hydroxybenzene	2,5-dibromophenol , 1,4-dibromo- 2-hydroxybenzene	2,6-dibromophenol , 1,3-dibromo- 2-hydroxybenzene	3,4-dibromophenol , 1,2-dibromo- 4-hydroxybenzene	3,5-dibromophenol , 1,3-dibromo- 5-hydroxybenzene
Structural formula
CAS number	57383-80-9	615-58-7	28165-52-8	608-33-3	615-56-5	626-41-5
PubChem	34264	12005	34177	11847	12003	12280
Molecular formula	C 6 H 4 Br 2 O
Molar mass	251.90 g mol −1
Physical state	firmly
Melting point	68-69 ° C	40 ° C	73-74 ° C	56-57 ° C	94 ° C	81 ° C
pK s value		7.79 (25 ° C)		6.67 (25 ° C)		8.06 (25 ° C)
GHS labeling	no classification available	danger	no classification available	Caution	no classification available	danger
H and P phrases	see above	300-315-319-335	see above	302-312-332	see above	301-315-319-335
	see above	no EUH phrases	see above	no EUH phrases	see above	no EUH phrases
	see above	261-264-301 + 310 305 + 351 + 338	see above	280	see above	261-301 + 310 305 + 351 + 338

Individual evidence

1. ↑ ^{a b c d e f g h i} Dictionary of organic compounds, p. 1971 ( limited preview in the Google book search).
2. ↑ Data sheet 2,4-dibromophenol from Sigma-Aldrich , accessed on November 5, 2016 ( PDF ).
3. ↑ Data sheet 2,6-dibromophenol from Sigma-Aldrich , accessed on November 5, 2016 ( PDF ).
4. ↑ Data sheet 3,5-dibromophenol from Sigma-Aldrich , accessed on November 5, 2016 ( PDF ).