1-Bromo-4-Chlorobutane (CAS 6940-78-9): Technical Guide & Applications
Table of Contents
- 1. Product Specifications & Comparative Analysis
- 2. Industrial Applications & Functional Mechanisms
- 3. Operational Guidelines & Safety Protocols
- 4. Case Studies in Pharmaceutical Synthesis
- 5. Client Success Stories
- 6. Request Customized Solutions
1. Product Specifications & Comparative Analysis
| Parameter | Value | Grade Comparison |
|---|---|---|
| CAS Number | 6940-78-9 | Pharma/Industrial/Research |
| Molecular Formula | C4H8BrCl | Consistent across grades |
| Molecular Weight | 171.46 g/mol | ±0.5% tolerance |
| Boiling Point | 80-82°C (30 mmHg) 164.3±8.0°C (760 mmHg) |
Pressure-dependent variants |
| Density | 1.488 g/cm³ | Technical: 1.485-1.491 |
| Refractive Index | 1.4865-1.4885 | HPLC Grade: ±0.0005 |
| Flash Point | 60°C (closed cup) | Class 3 Flammable Liquid |
| HS Code | 29034980 | Global compliance |
2. Industrial Applications & Functional Mechanisms
2.1 Pharmaceutical Intermediate
Critical precursor in synthesis of:
- Atypical antipsychotics: Brexpiprazole, Aripiprazole API production
- Neuroleptic agents: Facilitates alkylation in dopamine D2 receptor modulators
2.2 Specialty Chemistry
- Cross-coupling reactions: Buchwald-Hartwig aminations
- Phase-transfer catalysis: Quaternary ammonium compound synthesis
2.3 Fragrance Engineering
- Macrocyclic musk derivatives: Alkyl chain elongation agent
- Terpene modifications: Halogenation control point
3. Operational Guidelines & Safety Protocols
| Parameter | Specification |
|---|---|
| Storage | 2-8°C in amber glass under nitrogen |
| Handling | Class IIB ventilation, conductive equipment |
| Incompatibilities | Strong oxidizers, alkali metals |
| Shelf Life | 24 months unopened |
4. Case Studies in Pharmaceutical Synthesis
4.1 Brexpiprazole Manufacturing
Process optimization achieving 92% yield:
- Step 1: Nucleophilic substitution with piperazine derivative
- Step 2: Purification via fractional distillation (purity >99.5%)
4.2 Continuous Flow Chemistry
Microreactor system implementation:
- 30% reduction in reaction time
- Waste generation lowered by 45%
5. Client Success Stories
5.1 Top 10 Pharma Company (EU)
- Application: Aripiprazole scale-up
- Results: 15% batch consistency improvement
- Annual consumption: 8 MT
5.2 Fragrance Leader (USA)
- Application: Musk intermediate synthesis
- Outcome: 99.8% halogenation selectivity
- Ongoing partnership since 2022
6. Request Customized Solutions
Optimize your synthesis with our technical expertise:
- Email: info@vivalr.com
- Tel: (86) 15866781826
- Services: Custom purification, stable isotope labeling



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