4-Bromostyrene (CAS 2039-82-9): Technical Guide
Contents
1. Product Specifications & Comparative Analysis
| Parameter | 4-Bromostyrene | 3-Bromostyrene (CAS 2039-86-3) | 2-Bromostyrene (CAS 2039-88-5) |
|---|---|---|---|
| CAS Number | 2039-82-9 | 2039-86-3 | 2039-88-5 |
| Molecular Formula | C8H7Br | C8H7Br | C8H7Br |
| Molecular Weight | 183.05 g/mol | 183.05 g/mol | 183.05 g/mol |
| Boiling Point | 81°C (20 mmHg) 214°C (760 mmHg) |
N/A | N/A |
| Melting Point | 4.5°C | N/A | N/A |
| Flash Point | 75.6°C | N/A | N/A |
| Refractive Index | n20/D 1.59 | N/A | N/A |
Note: Contains 100 ppm TBC stabilizer to prevent polymerization.
2. Key Applications
- Pharmaceutical Intermediates: Synthesis of bioactive molecules via Suzuki coupling reactions.
- Polymer Chemistry: Monomer for functionalized polystyrene derivatives with enhanced flame retardancy.
- Organic Electronics: Precursor for conjugated polymers in OLED devices.
- Agrochemicals: Building block for crop protection agents.
3. Usage Scenarios
Scenario 1: Cross-Coupling Reactions
In Pd-catalyzed reactions, 4-bromostyrene demonstrates 92% yield in aryl-aryl bond formation under mild conditions (60°C, 12 hr).
Scenario 2: Controlled Polymerization
Radical polymerization with AIBN initiator achieves molecular weights up to 50,000 Da with PDI <1.5.
4. Industry Case Studies
Case Study 1: Specialty Chemical Manufacturer (Shanghai)
- Challenge: Develop UV-stable polymer coatings
- Solution: Incorporated 4-bromostyrene at 5% w/w
- Result: 40% improvement in weatherability (ASTM G154)
Case Study 2: Pharmaceutical Research Institute (Boston)
- Challenge: Synthesize kinase inhibitor analogs
- Solution: Used in Buchwald-Hartwig amination
- Result: Achieved 85% purity in final API (HPLC)
5. Safety & Handling
| Parameter | Requirement |
|---|---|
| Storage | 2-8°C under nitrogen |
| Shelf Life | 24 months in amber glass |
| PPE | Neoprene gloves, vapor respirator |
6. Contact for Technical Support
Email: info@vivalr.com
Tel: (86) 15866781826
Request MSDS or batch-specific analytical data:
- HPLC chromatograms
- GC purity reports
- NMR spectra (¹H/¹³C)
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