Industrial Grade 1-Bromo-3,4-dichlorobenzene: Purity Profiles and COA Verification
- [Reaction Kinetics]: Optimized bromination of o-dichlorobenzene achieves molar yields exceeding 90% with minimal polybrominated byproducts.
- [Logistics Stability]: Strict moisture control maintains water content ≤0.50% to prevent hydrolysis during tonnage storage.
- [Compliance Audit]: Full regulatory alignment with TSCA and REACH standards ensures seamless importation for commercial scale-up.
In the landscape of halogenated aromatic intermediates, 1-Bromo-3,4-dichlorobenzene (CAS: 18282-59-2) serves as a critical building block for pharmaceutical and agrochemical synthesis. As demand scales for N-arylated sultams and specialized heterocycles, procurement teams must prioritize batch-to-batch consistency over spot-market availability. NINGBO INNO PHARMCHEM CO.,LTD. operates as a premier global manufacturer, delivering process-scale purity that meets the rigorous demands of multinational R&D departments.
Understanding Impurity Profiles in Halogenated Aromatics
For process chemists, the viability of a synthesis route depends heavily on the impurity profile of the starting material. The production of 4-Bromo-1,2-dichlorobenzene typically involves the catalytic bromination of o-dichlorobenzene using iron powder. While standard laboratory procedures may yield crude product containing unreacted starting materials or isomeric contaminants like 2,3-dichlorobromobenzene, industrial manufacturing requires advanced distillation purification.
High-grade commercial batches must minimize high-boiling substances, specifically dibrominated or polybrominated products, which can interfere with downstream coupling reactions. Our manufacturing protocols focus on fractional distillation under reduced pressure (collecting fractions at 160-165 °C at -0.09 MPa) to ensure industrial purity levels exceed 99%. This level of refinement reduces the burden on downstream purification, ultimately lowering the cost of goods sold (COGS) for the final active pharmaceutical ingredient (API).
Validating Certificate of Analysis COA Data
Procurement specialists must look beyond the headline purity percentage when evaluating suppliers. A robust Certificate of Analysis (COA) provides transparency regarding specific impurities, density, and refractive index. When sourcing high-purity 4-Dichloro-1-bromobenzene, buyers should verify that the COA includes gas chromatography (GC) traces confirming the absence of isomeric interference.
Market analysis indicates significant price volatility for gram-scale quantities, but stable bulk price structures are available for tonnage commitments. A reliable global manufacturer will provide batch-specific documentation that aligns with the physical constants listed below. Discrepancies in melting point (24-25 °C) or density (1.761 g/mL) often signal inadequate purification or contamination with solvent residues.
| Parameter | Specification | Test Method |
|---|---|---|
| CAS Number | 18282-59-2 | N/A |
| Chemical Name | 1-Bromo-3,4-dichlorobenzene | N/A |
| Purity (GC) | ≥ 99.0% | Gas Chromatography |
| Water Content | ≤ 0.50% | Karl Fischer Titration |
| Melting Point | 24-25 °C | DSC / Capillary |
| Boiling Point | 124 °C (33 mm Hg) | Distillation |
| Density | 1.761 g/mL at 25 °C | Pyynometer |
Water Content ≤0.50% Stability Requirements
For executives overseeing supply chain continuity, stability during storage is paramount. Halogenated aromatics are susceptible to degradation if exposed to excessive moisture, which can lead to hydrolysis or corrosion of storage vessels. Maintaining a water content of ≤0.50% is critical for long-term stability. NINGBO INNO PHARMCHEM CO.,LTD. ensures all shipments are sealed in dry conditions at room temperature to preserve chemical integrity during transit.
Furthermore, regulatory compliance such as TSCA listing is essential for market access in North America and Europe. Our production facilities adhere to strict environmental and safety standards, ensuring that every shipment of 3,4-Dichloro-1-bromobenzene meets international regulatory requirements. This compliance mitigates risk for downstream manufacturers and facilitates smoother customs clearance.
Secure Your Supply Chain Today
Reliable access to high-quality intermediates is the backbone of efficient pharmaceutical production. To ensure your project timelines are met with verified materials, we invite you to contact our technical sales team for a batch-specific COA, SDS, or bulk pricing quote.