Industrial Purity Manufacturing Process 3-Bromo-6-Methylpyridin-2-Amine
- High-purity CAS 126325-46-0 available for bulk procurement.
- Optimized bromination process ensures superior yield and consistency.
- Full quality assurance with COA and SDS documentation provided.
In the realm of advanced organic synthesis, 2-Amino-3-bromo-6-methylpyridine (CAS: 126325-46-0) stands out as a critical building block for pharmaceutical and agrochemical development. This pyridine derivative is essential for constructing complex heterocyclic systems found in modern therapeutics. As demand scales for high-quality intermediates, the focus shifts from laboratory-scale preparation to robust industrial purity manufacturing. NINGBO INNO PHARMCHEM CO.,LTD. specializes in delivering this specific chemical intermediate with stringent quality controls suitable for global supply chains.
The molecular formula C6H7BrN2 and molecular weight of 187.04 g/mol define the physical constraints of the production process. Achieving consistent off-white crystalline solid form with a melting point between 77-79°C requires precise control over reaction kinetics and purification stages. Below, we detail the technical considerations for producing this compound at a commercial scale.
Scalable Synthesis Route for 3-Bromo-6-Methylpyridin-2-Amine
The production of 3-bromo-6-methylpyridin-2-amine typically involves the electrophilic aromatic bromination of 2-amino-6-methylpyridine. While laboratory protocols often cite yields around 55%, industrial processes must optimize this figure to ensure commercial viability. The reaction is conducted in an acidic media, typically utilizing concentrated hydrochloric acid and sulfuric acid to protonate the pyridine nitrogen, thereby directing the bromine substitution to the desired position.
Temperature control is paramount. The bromine solution is added dropwise to the cooled reaction mixture, maintained at 0°C in an ice water bath. This minimizes side reactions such as dibromination or oxidation of the amino group. Following the addition, the mixture is stirred at room temperature to ensure completion. The workup involves neutralization with cold aqueous sodium hydroxide, precipitating the crude product. For partners evaluating the technical specifics of this synthesis route, scaling requires specialized reactors capable of handling exothermic halogenation safely.
Purification is achieved through recrystallization using solvents such as dichloromethane and ethyl acetate or ethanol-water systems. This step is critical for removing inorganic salts and unreacted starting materials. NINGBO INNO PHARMCHEM CO.,LTD. employs advanced chromatography and crystallization techniques to maximize recovery while maintaining high purity standards.
Achieving ≥99.0% Industrial Purity Standards
For a global manufacturer, meeting specification limits is not optional. The target purity for pharmaceutical-grade 2-Amino-3-bromo-6-methylpyridine is typically ≥99.0% as determined by HPLC. Impurities must be identified and quantified, with individual unknowns kept below 0.10% and total impurities below 1.0%.
Key quality parameters include:
- Appearance: Off-white to light yellow crystalline solid.
- Loss on Drying: ≤0.5% to ensure minimal moisture content.
- Residue on Ignition: ≤0.1% to confirm low inorganic contamination.
Batch-to-batch consistency is verified through rigorous analytical testing. Every shipment includes a Certificate of Analysis (COA) detailing the specific batch data. This level of quality assurance is vital for downstream synthesis where impurity profiles can affect catalytic cycles or biological activity.
Technical Specifications Table
| Parameter | Specification | Test Method |
|---|---|---|
| CAS Number | 126325-46-0 | Verification |
| Molecular Formula | C6H7BrN2 | Calculation |
| Molecular Weight | 187.04 g/mol | Calculation |
| Purity (HPLC) | ≥ 99.0% | Area Normalization |
| Melting Point | 77-79°C | Capillary Method |
| Appearance | Off-white Solid | Visual Inspection |
| Storage Conditions | 2-8°C, Inert Atmosphere | Stability Study |
Impurity Control in Manufacturing Process
The primary challenge in manufacturing this Bromo methylpyridine derivative is controlling regioisomers and over-brominated species. The amino group is activating, but under acidic conditions, the pyridine ring is deactivated, requiring careful balancing of reaction conditions. Potential impurities include 2-amino-5-bromo-6-methylpyridine or dibromo derivatives.
Advanced process analytical technology (PAT) is used during the manufacturing process to monitor reaction progress in real-time. This allows for immediate adjustments to stoichiometry or temperature if deviation occurs. Post-reaction, preparative HPLC or multiple recrystallization steps are employed to isolate the target isomer. For clients requiring custom synthesis with tighter impurity profiles, additional purification cycles can be implemented to meet specific project needs.
Safety and Handling Guidelines
Safety is integral to the handling of halogenated pyridines. The compound is classified under GHS07 with hazard statements including H302 (Harmful if swallowed), H315 (Causes skin irritation), and H319 (Causes serious eye irritation). Proper personal protective equipment (PPE) including gloves and safety glasses must be worn during handling.
| Safety Parameter | Details |
|---|---|
| Signal Word | Warning |
| Hazard Class | 6.1 |
| HS Code | 29333999 |
| Storage Temp | Keep in dark place, Inert atmosphere, 2-8°C |
| Sensitivity | Light Sensitive |
Material Safety Data Sheets (SDS) are provided with every bulk order, ensuring compliance with international transport regulations. The product should be stored in a cool, dry place away from oxidizing agents and light to prevent degradation.
Commercial Availability and Bulk Procurement
Procuring this chemical intermediate requires a partner capable of sustaining large-volume output without compromising quality. Market data indicates significant price variance based on purity and pack size, with bulk quantities offering substantial cost efficiencies compared to gram-scale research pricing. NINGBO INNO PHARMCHEM CO.,LTD. offers competitive bulk pricing structures for tonnage orders, supported by reliable logistics networks.
Packaging options typically include 25kg fiber drums or customized containers based on client requirements. Lead times are optimized to ensure continuous supply for production lines. Whether for pharmaceutical development targeting neurological disorders or agrochemical formulations, securing a stable supply of high-purity 2-Amino-3-bromo-6-methylpyridine is essential for project success.
For further technical inquiries or to request a sample for evaluation, contact our sales team. We are committed to supporting your R&D and production needs with superior chemical solutions.