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
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)
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
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.
N-Bromosuccinimide Price
- Product number
- 116157
- Product name
- 1,4-Dibromo-2,5-dimethylbenzene
- Purity
- 98%
- Packaging
- 25g
- Price
- $63.1
- Updated
- 2025/07/31
- Product number
- 116157
- Product name
- 1,4-Dibromo-2,5-dimethylbenzene
- Purity
- 98%
- Packaging
- 100g
- Price
- $90.5
- Updated
- 2025/07/31
- Product number
- D1841
- Product name
- 2,5-Dibromo-p-xylene
- Packaging
- 25G
- Price
- $151
- Updated
- 2025/07/31
- Product number
- D1841
- Product name
- 2,5-Dibromo-p-xylene
- Packaging
- 100G
- Price
- $452
- Updated
- 2025/07/31
- Product number
- D425570
- Product name
- 1,4-Dibromo-2,5-dimethylbenzene
- Packaging
- 10g
- Price
- $65
- Updated
- 2021/12/16
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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View Lastest Price from 1,4-Dibromo-2,5-dimethylbenzene manufacturers
- 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
- 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
- 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