ChemicalBook > CAS DataBase List > 1,4-Dibromo-2,5-dimethylbenzene

1,4-Dibromo-2,5-dimethylbenzene

Product Name
1,4-Dibromo-2,5-dimethylbenzene
CAS No.
1074-24-4
Chemical Name
1,4-Dibromo-2,5-dimethylbenzene
Synonyms
2,5-Dibromo-xylene;2,5-DIBROMO-4-XYLENE;2,5-DIBROMO-P-XYLENE;1,4-Dibromo-2,5-dime;2,5-dibromo-2-xylene;p-Xylene, 2,5-dibromo-;1,4-Dibromo-2,5-dimethyL;2,5-Dibromo-p-xylene >2,5-Dibromo-p-xylene 99%;2,5-DIBROMO-P-XYLENE, 98+%
CBNumber
CB9345577
Molecular Formula
C8H8Br2
Formula Weight
263.96
MOL File
1074-24-4.mol
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1,4-Dibromo-2,5-dimethylbenzene Property

Melting point:
72-74 °C(lit.)
Boiling point:
261 °C(lit.)
Density 
1.7485 (rough estimate)
refractive index 
1.543-1.545
storage temp. 
Sealed in dry,Room Temperature
form 
powder to crystal
color 
White to Light yellow
Water Solubility 
Soluble in toluene, hot ethanol and hot methanol.Insoluble in water.
BRN 
2080433
InChI
InChI=1S/C8H8Br2/c1-5-3-8(10)6(2)4-7(5)9/h3-4H,1-2H3
InChIKey
QENIALCDPFDFHX-UHFFFAOYSA-N
SMILES
C1(Br)=CC(C)=C(Br)C=C1C
CAS DataBase Reference
1074-24-4(CAS DataBase Reference)
NIST Chemistry Reference
Benzene, 1,4-dibromo-2,5-dimethyl-(1074-24-4)
EPA Substance Registry System
Benzene, 1,4-dibromo-2,5-dimethyl- (1074-24-4)
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Safety

Hazard Codes 
Xi
Risk Statements 
36/37/38-51/53
Safety Statements 
26-37/39-61
RIDADR 
UN 2811 6.1/PG 1
WGK Germany 
3
TSCA 
Yes
HS Code 
29039990
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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

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

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.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
116157
Product name
1,4-Dibromo-2,5-dimethylbenzene
Purity
98%
Packaging
25g
Price
$63.1
Updated
2025/07/31
Sigma-Aldrich
Product number
116157
Product name
1,4-Dibromo-2,5-dimethylbenzene
Purity
98%
Packaging
100g
Price
$90.5
Updated
2025/07/31
TCI Chemical
Product number
D1841
Product name
2,5-Dibromo-p-xylene
Packaging
25G
Price
$151
Updated
2025/07/31
TCI Chemical
Product number
D1841
Product name
2,5-Dibromo-p-xylene
Packaging
100G
Price
$452
Updated
2025/07/31
TRC
Product number
D425570
Product name
1,4-Dibromo-2,5-dimethylbenzene
Packaging
10g
Price
$65
Updated
2021/12/16
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1,4-Dibromo-2,5-dimethylbenzene Chemical Properties,Usage,Production

Chemical Properties

white to slightly yellow shiny crystalline powder

Uses

1,4-dibromo-2,5-dimethylbenzene has been used in the preparation of 4,4″-diformyl-2′,5′-dimethyl-1,1′.4′,1″-terphenyl. It has also been used in the preparation of 1,4-diformyl-2,5-dimethylbenzene.

Synthesis

106-42-3

1074-24-4

The general procedure for the synthesis of 2,5-dibromo-1,4-dimethylbenzene from p-xylene was as follows: dichloromethane (50 mL) was added to a 150 mL two-necked round-bottomed flask and p-xylene (16.96 g, 0.16 mol, 19.8 mL) was accurately weighed and added to it. Subsequently, iodine (0.1 g, 0.8 mmol) was added to the mixture. An air condenser tube was fitted to one neck of the flask and connected to a tail gas recovery unit; the other neck was fitted with a constant pressure dropping funnel. Accurately measure the liquid bromine (18 mL) and transfer it to the constant-pressure dropping funnel, covering the top layer of the bromine solution with a layer of water (about 0.3-0.5 cm) to prevent volatilization of the bromine. The bottle was stoppered tightly and the temperature of the reaction system was controlled at 12°C under strong stirring and light protection. Slowly add liquid bromine dropwise to the reaction mixture (dropwise addition time is controlled at 40 to 50 minutes), taking care to avoid water droplets entering the reaction solution. The reaction lasted for 18 hours. Upon completion of the reaction, 40 mL of 25% aqueous KOH solution was added and stirred vigorously for 30 minutes. The reaction mixture was transferred to a separatory funnel, and the lower organic phase was separated and washed twice (50 mL each) with deionized water. The organic phase was dried with anhydrous CaCl2, filtered and the solvent was removed under reduced pressure. The residue was recrystallized twice (300 mL each) with ethanol to give white needle-like crystals. The yield was 96.5% (40.44 g).

References

[1] Patent: CN105085340, 2017, B. Location in patent: Paragraph 0037; 0038
[2] Crystal Growth and Design, 2016, vol. 16, # 7, p. 3993 - 4004
[3] Organic Letters, 2011, vol. 13, # 6, p. 1462 - 1465
[4] Patent: CN107721905, 2018, A. Location in patent: Paragraph 0024
[5] Patent: CN108440386, 2018, A. Location in patent: Paragraph 0041; 0044; 0045

1,4-Dibromo-2,5-dimethylbenzene Preparation Products And Raw materials

Raw materials

Preparation Products

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1,4-Dibromo-2,5-dimethylbenzene Suppliers

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View Lastest Price from 1,4-Dibromo-2,5-dimethylbenzene manufacturers

Speranza Chemical Co., Ltd.
Product
1,4-dibromo-2,5-dimethyl benzene 1074-24-4
Price
US $60.00/KG
Min. Order
1KG
Purity
98%
Supply Ability
300MT/year
Release date
2019-11-22
Hebei Chuanghai Biotechnology Co,.LTD
Product
1,4-Dibromo-2,5-dimethylbenzene 1074-24-4
Price
US $30.00-10.00/kg
Min. Order
10kg
Purity
99%
Supply Ability
100000kg
Release date
2024-08-22
Henan Fengda Chemical Co., Ltd
Product
1,4-Dibromo-2,5-dimethylbenzene 1074-24-4
Price
US $100.00-1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
g-kg-tons, free sample is available
Release date
2023-12-25

1074-24-4, 1,4-Dibromo-2,5-dimethylbenzeneRelated Search:

1,2-DIBROMOETHYLENE 1,3-Dibromo-5,5-dimethylhydantoin Musk xylene XYLENE CYANOL FF alpha,alpha'-Dibromo-p-xylene P-XYLENE 1,2-Dibromopropane DBDCB Xylene poly-p-xylene 2,5-Dibromoterephthalic acid dimethyl 2,5-dibromoterephthalate 2,3,5,6-Tetrabromo-p-xylene dibromoethyl alcohol 1,2-DIBROMO-4,5-DIMETHYLBENZENE,4,5-DIBROMO-1,2-DIMETHYLBENZENE,1,2-Dibromo-4,5-dimethylbenzene 98+% 1,4-Dibromobenzene TETRABROMOTEREPHTHALIC ACID 1,4-DIBROMO-2,3,5,6-TETRAMETHYLBENZENE

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  • 1074-24-4
  • CH32C6H2Br2
  • C8H8Br
  • Organic Building Blocks
  • Halogenated Hydrocarbons
  • Building Blocks
  • C8
  • Aryl
  • Aryl
  • Building Blocks
  • C8
  • Chemical Synthesis
  • Halogenated Hydrocarbons
  • Organic Building Blocks
  • Bromine Compounds
  • Fluorobenzene
  • Aromatic Halides (substituted)