Industrial Purity Specs For 4-Hydroxy-6,7-Dimethoxyquinoline
- Strict HPLC purity >98% with controlled impurity profiles for kinase inhibitor synthesis.
- Scalable manufacturing process offering significant cost advantages over lab-grade reagents.
- Full GMP compliance with comprehensive COA documentation for global regulatory submission.
In the landscape of modern pharmaceutical intermediates, consistent quality and scalable supply chains are paramount. 4-Hydroxy-6,7-dimethoxyquinoline (CAS 13425-93-9) serves as a critical building block in the development of tyrosine kinase inhibitors, including analogs related to Cabozantinib and Tivozanib. For process chemists and procurement managers, understanding the distinction between laboratory-grade specifications and true industrial purity is essential for successful scale-up. As a premier global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. adheres to rigorous standards to ensure batch-to-batch consistency required for GMP environments.
Key Physical and Chemical Specifications
When evaluating suppliers, the physical properties of the material often dictate downstream processing efficiency. The compound, also known synonymously as 6,7-Dimethoxyquinolin-4-ol, presents specific characteristics that must be verified against the Certificate of Analysis (COA). Deviations in melting point or solubility can indicate the presence of isomeric impurities or residual solvents that may interfere with subsequent coupling reactions.
| Parameter | Specification |
|---|---|
| CAS Number | 13425-93-9 |
| Molecular Formula | C11H11NO3 |
| Molecular Weight | 205.21 g/mol |
| Melting Point | 227.0 – 231.0 °C |
| Appearance | Light orange to Yellow crystalline powder |
| Purity (HPLC) | ≥ 98.0% (Industrial Grade ≥ 99.0%) |
| Storage Conditions | Inert atmosphere, Room Temperature |
The melting point range is a critical quality indicator. While laboratory data suggests a range of 229°C, industrial batches must maintain a tight window between 227.0°C and 231.0°C to ensure crystallinity. Furthermore, solubility profiles indicate the material is slightly soluble in DMSO and Methanol, often requiring sonication. This physical behavior impacts reactor cleaning protocols and solution preparation during the manufacturing process.
Comparing Industrial vs. Lab-Grade Specifications
A common pitfall in early-stage drug development is relying on lab-grade reagents for pilot plant studies. Market data indicates that small-pack pricing for this quinoline derivative can exceed $150 per gram. However, transitioning to bulk procurement drastically alters the cost structure. A robust synthesis route optimized for tonnage production reduces the bulk price significantly, often bringing costs down to a fraction of laboratory catalog rates.
Industrial specifications demand more than just high HPLC area percent. They require control over specific impurities, such as residual starting materials or hydrolysis byproducts. For instance, common synthesis pathways involve the hydrolysis of ethyl 4-hydroxy-6,7-dimethoxyquinoline-3-carboxylate. Inefficient conversion can leave behind ester impurities that are difficult to remove in later steps. NINGBO INNO PHARMCHEM CO.,LTD. utilizes optimized reaction conditions, including controlled temperature and pressure profiles, to maximize yields and minimize these persistent impurities.
When sourcing high-purity 6,7-Dimethoxy-4-hydroxyquinoline, buyers should prioritize suppliers who can demonstrate scalability. Lab-scale microwave synthesis might achieve 90% yields in minutes, but industrial reactors require different thermal dynamics to ensure safety and uniformity across large volumes.
Certificate of Analysis (COA) Requirements for GMP Compliance
For pharmaceutical intermediates intended for human use, the COA is not merely a formality; it is a regulatory necessity. A comprehensive COA for CAS 13425-93-9 must include detailed data on identification, assay, and impurities. Key elements include:
- Identification: FTIR and NMR data matching reference standards (e.g., 1H NMR signals at δ 3.81 and 3.84 ppm for methoxy groups).
- Assay: Quantitative HPLC analysis confirming purity levels ≥ 98.0% or higher depending on the agreement.
- Residual Solvents: Compliance with ICH Q3C guidelines for solvents like Ethanol, THF, or DMSO used during crystallization.
- Heavy Metals: Verification that levels are within safe limits for downstream processing.
Safety data is equally critical. The material is classified under GHS07 with hazard statements H315 and H319, indicating it is an irritant to skin and eyes. Proper handling procedures, including the use of P280 protective gloves and eye protection, must be documented and communicated alongside the COA. HS Code 2933.49.7000 is typically used for customs classification, facilitating smoother international logistics.
Strategic Procurement and Supply Chain Stability
Securing a reliable supply of key intermediates mitigates the risk of production delays. The market for quinoline derivatives is competitive, but few suppliers offer the technical support required for custom synthesis or process optimization. Partnering with an established entity ensures that any changes in the manufacturing process are communicated promptly, preventing unexpected variations in the final drug substance.
Moreover, industrial clients often require flexible packaging solutions ranging from kilograms for clinical trials to tons for commercial launch. The ability to supply material with consistent physical forms, such as powder to crystal transitions, ensures that flowability and dosing accuracy are maintained in automated production lines. By focusing on industrial purity and regulatory compliance, manufacturers can accelerate their timeline from clinical phases to market approval.
In conclusion, the selection of 4-Hydroxy-6,7-dimethoxyquinoline should be driven by data-driven quality metrics rather than price alone. Understanding the technical nuances of synthesis, purity profiling, and documentation ensures a robust supply chain. For partners seeking a reliable source of this critical intermediate, NINGBO INNO PHARMCHEM CO.,LTD. stands ready to provide comprehensive technical support and bulk supply solutions tailored to the rigorous demands of the pharmaceutical industry.