Industrial Purity Specifications and COA Analysis for 2-Bromo-4-Fluorobenzonitrile
- Critical Quality Attributes: Assay purity typically exceeds 98% with strict controls on residual solvents and heavy metals.
- Physical Constants: Melting point range of 77-78°C and boiling point of 262.4±25.0 °C serve as key identity markers.
- Supply Chain Security: Reliable bulk procurement requires verified COA documentation and compliant storage protocols.
In the realm of fine chemical synthesis and pharmaceutical intermediate manufacturing, the consistency of raw materials dictates the success of downstream processes. 2-Bromo-4-fluorobenzonitrile (CAS: 36282-26-5) is a critical building block used extensively in the production of agrochemicals and medicinal compounds. For procurement managers and process chemists, understanding the Certificate of Analysis (COA) parameters is not merely a regulatory formality but a fundamental aspect of risk management. As a premier global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. emphasizes the importance of transparent technical data to ensure seamless integration into complex manufacturing process workflows.
Key Chemical Properties and Identification Parameters
Accurate identification of the material is the first step in quality assurance. The physical and chemical properties listed in a comprehensive COA allow chemists to verify the identity of the batch before it enters the production line. Deviations in melting point or density can indicate the presence of isomers or unreacted starting materials, which may compromise subsequent reaction yields.
The following table outlines the standard technical specifications expected for high-grade batches of this nitrile derivative:
| Parameter | Specification / Value | Significance |
|---|---|---|
| CAS Number | 36282-26-5 | Unique chemical identifier for regulatory compliance. |
| Molecular Formula | C7H3BrFN | Confirms elemental composition. |
| Molecular Weight | 200.01 g/mol | Essential for stoichiometric calculations. |
| Melting Point | 77-78°C | Key purity indicator; broad ranges suggest impurities. |
| Boiling Point | 262.4±25.0 °C | Defines distillation parameters during purification. |
| Appearance | White to Gray to Brown Powder/Crystal | Visual inspection for oxidation or contamination. |
| Solubility | Soluble in Methanol | Determines suitable recrystallization solvents. |
Evaluating the Synthesis Route and Impurity Profiles
The quality of the final intermediate is intrinsically linked to the synthesis route employed during production. Common industrial methods involve the conversion of 2-bromo-4-fluorobenzaldehyde via oxidative cyanation or similar transformations. While laboratory-scale procedures may utilize photoredox catalysis with ruthenium complexes, large-scale production often prioritizes robustness and cost-efficiency.
Process chemists must scrutinize the COA for specific impurities related to the synthetic pathway. For instance, residual aldehyde starting materials or over-oxidized byproducts can interfere with downstream coupling reactions. A high-quality industrial purity specification will explicitly list limits for these related substances, often requiring them to be below 0.5% individually and 1.0% collectively. When sourcing high-purity 2-Bromo-4-fluorobenzonitrile, buyers should verify that the supplier utilizes advanced chromatography techniques to minimize these structural analogs.
Furthermore, the alternative nomenclature 4-fluoro-2-bromobenzonitrile is sometimes used in literature and procurement documents. It is vital to ensure that the CAS number remains consistent across all documentation to avoid cross-contamination with regioisomers, which possess different reactivity profiles.
Critical COA Metrics for Pharmaceutical Compliance
Beyond assay percentage, a robust COA must address safety and residual contaminants. Pharmaceutical and agrochemical clients operate under strict guidelines such as ICH Q3 standards. The following metrics are non-negotiable for premium batches:
- Assay (Purity): Typically required to be >98.0% or >99.0% depending on the application. This is determined via HPLC or GC analysis.
- Residual Solvents: Strict limits on Class 1, 2, and 3 solvents (e.g., acetonitrile, ethyl acetate, hexane) used during crystallization and washing steps.
- Heavy Metals: Compliance with ppm limits for lead, arsenic, cadmium, and mercury is essential for final drug substance approval.
- Water Content: Karl Fischer titration results should indicate low moisture content to prevent hydrolysis of the nitrile group during storage.
Safety, Storage, and Logistics
Proper handling is crucial due to the hazardous nature of halogenated nitriles. The material is classified under Hazard Class 6.1 (Toxic) and carries risk statements related to acute toxicity and irritation. Safety Statements recommend wearing protective clothing and ensuring adequate ventilation. The UN number for transport is typically 3439, requiring adherence to specific packing group regulations (Group III).
To maintain stability, the product should be stored in a sealed container in a dry environment at room temperature. Exposure to moisture or prolonged heat can degrade the chemical integrity, leading to a shift in the melting point and the formation of amides or acids. Reliable suppliers provide detailed safety data sheets (SDS) alongside the COA to ensure safe logistics from the manufacturing process facility to the client's warehouse.
Procurement Strategy and Bulk Pricing
Securing a stable supply chain for specialized intermediates requires partnering with established entities. Bulk price fluctuations are often driven by the availability of raw fluorinated and brominated precursors. Long-term contracts with verified manufacturers help mitigate these volatility risks. NINGBO INNO PHARMCHEM CO.,LTD. offers consistent supply chains backed by rigorous quality control laboratories, ensuring that every batch meets the specified industrial purity standards.
In conclusion, the technical evaluation of 2-Bromo-4-fluorobenzonitrile extends beyond simple price comparison. It demands a thorough review of the COA, an understanding of the synthesis implications on impurity profiles, and strict adherence to safety protocols. By prioritizing verified specifications and reliable manufacturing partners, organizations can ensure the efficiency and safety of their chemical synthesis operations.