Sigma-Aldrich 535338 Equivalent: 2-Chloro-3-Cyanopyridine
Chromatographic Impurity Profiling During Scale-Up: Quantifying Trace Halogenated Byproducts That Trigger Palladium Catalyst Poisoning
When transitioning from milligram-scale discovery to kilogram-scale production, the impurity profile of this heterocyclic building block undergoes significant changes. Standard GC methods often fail to resolve trace halogenated byproducts that emerge during the POCl3 chlorination step. Specifically, incomplete conversion of nicotinamide-N-oxide can leave residual nitrogen-oxide species, while over-chlorination may generate 2,3-dichloropyridine. In organic synthesis workflows utilizing palladium-catalyzed cross-couplings, these trace species act as potent catalyst poisons, reducing turnover numbers and yield. Our engineering protocol includes a targeted LC-MS screen for these specific byproducts, ensuring the material maintains high catalytic efficiency even in sensitive cycles. This level of profiling is critical for R&D leads validating scale-up candidates.
Residual Solvent Limits, Technical Specs, and COA Parameters for Sigma-Aldrich 535338 Equivalent Bulk Sourcing
Procurement teams evaluating the Sigma-Aldrich 535338 equivalent must verify residual solvent limits, particularly methanol and water, which are used in the final recrystallization. Our manufacturing process ensures residual solvents are controlled within ICH Q3C guidelines. The COA provided with every batch details these limits. This material, also known as 2-Chloronicotinonitrile, serves as a direct drop-in replacement, offering identical technical parameters at a significantly reduced cost per kilogram, optimizing your supply chain economics without compromising assay integrity. Laboratory suppliers often face allocation issues during high demand; our bulk manufacturing capacity ensures consistent availability, preventing production downtime.
| Parameter | Sigma-Aldrich 535338 | NINGBO INNO PHARMCHEM Equivalent |
|---|---|---|
| CAS Number | 6602-54-6 | 6602-54-6 |
| Molecular Formula | C6H3ClN2 | C6H3ClN2 |
| Molecular Weight | 138.55 g/mol | 138.55 g/mol |
| Melting Point | 104-107 °C | 104-107 °C |
| Purity (GC) | 98% | 98% |
| Appearance | White to off-white crystalline | White to off-white crystalline powder |
Bulk Manufacturing Controls vs Lab-Scale Synthesis: Ensuring Consistent Turnover Numbers in Suzuki-Miyaura Couplings
Lab-scale synthesis often yields material with variable particle size distributions, which can impact dissolution kinetics in high-concentration Suzuki-Miyaura couplings. Our bulk manufacturing controls particle size to ensure consistent dissolution rates, preventing localized concentration gradients that lead to homocoupling byproducts. Additionally, we monitor color intensity (Pt-Co scale) as a non-standard parameter. Trace colored impurities from the POCl3 step, if not fully removed by activated carbon, can carry through to the final API, complicating downstream purification. Our process guarantees a consistent white to off-white appearance, ensuring color neutrality in your final product. The synthesis route involves chlorination of nicotinamide-N-oxide followed by distillation and recrystallization. Maintaining industrial purity requires strict control over the distillation cut points to exclude higher boiling oligomers. Temperature control between 35-80°C during the POCl3 reaction is critical to maximize conversion while minimizing decomposition.
Technical Purity Grades and Industrial Bulk Packaging for Purification-Free Cross-Coupling Workflows
We supply this 2-chloro-3-pyridinecarbonitrile in industrial bulk packaging to support continuous manufacturing. Standard packaging includes 25kg fiber drums with double PE liners, ensuring moisture protection during transit. For larger volumes, IBC totes are available. This packaging strategy reduces handling risks and lowers the effective bulk price per unit compared to laboratory glass bottles. For applications where the intermediate is used directly in the next coupling step without isolation, our material meets the stringent impurity limits required for purification-free workflows, saving time and solvent costs. Shipping is classified under UN 3439, Class 6.1, Packing Group III. All shipments comply with standard hazardous material transport regulations. Request a technical data sheet for 2-Chloro-3-cyanopyridine.
Frequently Asked Questions
How do your COA reporting standards compare to laboratory suppliers?
Our COA provides comprehensive data including GC purity, residual solvent limits per ICH Q3C, and heavy metal analysis. Unlike some laboratory suppliers, we also report specific impurity profiles relevant to cross-coupling efficiency, ensuring full transparency for R&D validation.
Can you guarantee batch-to-batch consistency for pilot scale-up trials?
Yes. Our manufacturing process utilizes automated control systems for the chlorination and recrystallization steps. This minimizes variability in critical parameters such as melting point range and impurity distribution, providing the consistency required for successful pilot scale-up.
What are the handling protocols for crystalline polymorphs during warehouse transfer?
This material is supplied as a stable crystalline powder. During warehouse transfer, use sealed containers to prevent moisture ingress. Store in a cool, dry place away from direct sunlight. The material does not exhibit problematic polymorphic behavior under standard storage conditions, ensuring consistent physical properties upon receipt.
Sourcing and Technical Support
NINGBO INNO PHARMCHEM CO.,LTD. provides reliable bulk sourcing for this critical intermediate. Our technical team supports your transition from lab to production with detailed engineering data and consistent supply chain performance. Partner with a verified manufacturer. Connect with our procurement specialists to lock in your supply agreements.