For professionals in the pharmaceutical and fine chemical industries, the quality of raw materials directly impacts the success of synthesis, product efficacy, and regulatory compliance. 4-Nitro-2,3-lutidine-N-oxide (CAS No: 37699-43-7) is a prime example of an intermediate where stringent quality control and precise specifications are non-negotiable. This article examines these critical aspects when sourcing this compound, especially from manufacturers in China.

The primary specification for 4-Nitro-2,3-lutidine-N-oxide, as highlighted by its key applications in producing Lansoprazole and Rebeprazole, is its purity. A minimum assay of ≥98.0% is a standard requirement, ensuring that the material is sufficiently pure for complex organic syntheses. High purity is essential to prevent unwanted side reactions, maximize yield, and ensure the final API meets stringent pharmaceutical standards. When you buy 4-Nitro-2,3-lutidine-N-oxide CAS 37699-43-7, always prioritize suppliers who provide verified purity data.

Beyond the assay, several physical and chemical properties are crucial for quality assessment. The appearance of 4-Nitro-2,3-lutidine-N-oxide is typically described as a yellow crystalline powder. Variations in color or form could indicate the presence of impurities or degradation. Other important parameters include the melting point, which is generally specified within a narrow range (e.g., 89-93°C for purified material), and loss on drying (≤0.5%), which indicates the absence of excessive moisture. A reliable pharmaceutical intermediate manufacturer China will meticulously control these parameters during production.

Quality control processes employed by reputable Chinese suppliers are crucial. This often involves rigorous testing at various stages of production, from raw material intake to final product release. Techniques such as High-Performance Liquid Chromatography (HPLC) are commonly used to determine the assay and identify potential impurities. A comprehensive Certificate of Analysis (CoA) should accompany each batch, detailing all relevant specifications and test results. For researchers and procurement managers, understanding and verifying these CoAs is a key step in ensuring product quality.

When seeking a supplier for this intermediate, look for those who emphasize transparency and provide detailed technical packages. Keywords such as 'high purity 4-Nitro-2,3-lutidine-N-oxide' and 'quality pharmaceutical intermediates' will help identify such partners. By meticulously reviewing the specifications and trusting manufacturers with robust quality assurance systems, businesses can confidently source 4-Nitro-2,3-lutidine-N-oxide from China, ensuring the integrity and success of their downstream processes. This focus on quality control is fundamental for any R&D or manufacturing operation.