High purity synthesis intermediates are the cornerstone of reliable and efficient agrochemical manufacture. For example, the compound with CAS number 123456-78-9, bearing a molecular weight of 312.28 and molecular formula C16H16N2O4, represents a class of intermediates designed with stringent purity demands in mind. Companies specializing in custom and catalog supply, such as Technical Insights, must consistently deliver products with a minimum 98% yield, HPLC purity levels exceeding 99.5%, and validated multi-kilogram-scale supply capabilities for global agrochemical manufacturers.
The complexity of these synthesis intermediates often arises not only from their functional group density but also from the precise control of stereochemistry, which is essential for the selectivity and safety of the resultant agrochemical products. The management of yield and purity in each process stage directly impacts downstream processing, bioactivity, and regulatory acceptability. Technical Insights has built a reputation by marrying process innovation with cGMP rigor, supporting both new product introductions and reliable long-term supply.
The industrial workflow for manufacturing this high purity intermediate commences with a carefully controlled condensation reaction. Specifically, 4-aminobenzoic acid (10.0 kg, 72.9 mol) is dissolved in 40 liters of acetonitrile, to which 12.5 kg (80.2 mol) of methyl ethyl ketone is added. The reaction mixture is cooled to between 0°C and 5°C, and a catalytic amount of p-toluenesulfonic acid (0.5 kg) is introduced. Stirring is maintained for 8 hours under nitrogen to minimize oxidative byproducts. Following completion, the mixture is gradually warmed to 25°C to ensure reaction completion as confirmed by TLC.
Upon completion of condensation, the product mixture is transferred to a pH adjustment vessel. The pH is carefully raised to 6.5–7.0 by incremental addition of 2 M sodium carbonate, with temperature controlled at 10–15°C to prevent premature crystallization. Once neutralization is achieved, the contents are seeded with 0.2 kg of preformed intermediate crystals and stirred at 5°C for 3 hours to promote uniform nucleation. The resulting suspension is filtered, washed with cold acetonitrile to remove impurities, and the wet cake is retained.
This two-stage process reliably delivers a batch yield of 98%, with HPLC analysis confirming purity greater than 99.5%. Proton NMR data is indispensable for batch release, and for this intermediate, the ^1H NMR (400 MHz, DMSO-d6) spectrum displays characteristic peaks at delta 7.92 (d, J=8.5 Hz, 2H), 7.13 (d, J=8.5 Hz, 2H), 3.82 (s, 3H), 2.45 (s, 3H), and 1.85 (s, 3H). These assignments, corroborated by coupling constants and integration, reflect structural integrity and expected substitution pattern.
Ensuring cGMP alignment in the manufacture of such high-purity agrochemical intermediates is non-negotiable. Every batch is accompanied by a release Certificate of Analysis that details a comprehensive analytical package. This includes not only ^1H NMR for structural validation but also FT-IR for complementing functional group analysis, HPLC for precise purity assessment, GC analysis that meets ICH Q3C residual solvent requirements, and ICP-MS data confirming element-specific heavy metal content in compliance with ICH Q3D. Water content is meticulously determined using Karl Fischer titration to ensure compliance with strict specification limits. Dedicated Drug Master File (DMF) support is available, ensuring that global customers benefit from transparent and up-to-date regulatory documentation for their registration dossiers.
Isolation and crystallization are carried out with technical finesse to maintain both purity and yield. After primary filtration, the wet product undergoes a triple washing protocol: first with cold acetonitrile (0–5°C), secondly with chilled isopropanol, and finally with minimal-volume deionized water at 4°C. Each solvent phase is designed to strip away distinct classes of residual process contaminants. The washed material is then loaded onto vacuum trays and dried under a steady vacuum of 30 mbar at 35°C for a full 15 hours, producing a free-flowing, crystalline powder with water content below 0.2% as verified by KF titration. A detailed product profile and ordering information for this intermediate is available through the Technical Insights product catalogue online.
A concise summary of key technical specifications is as follows. The compound has a molecular weight of 312.28 and an empirical formula of C16H16N2O4. Appearance is specified as an off-white crystalline powder. Purity is routinely measured above 99.5% by HPLC and water content is consistently below 0.2% as per Karl Fischer titration. Residual solvents are present at levels compliant with ICH Q3C guidelines. Heavy metal impurities, assessed by ICP-MS, are below 10 ppm to meet ICH Q3D thresholds. The product is typically packaged in 5 kg double PE-lined drums for security and stability. All lots provide a complete NMR and FT-IR analytical data package, as reflected in the batch-specific Certificate of Analysis.
In conclusion, the manufacture of high purity synthesis intermediates such as this CAS 123456-78-9 compound represents a sophisticated interplay of chemistry and process engineering under carefully validated and cGMP-controlled conditions. By maintaining a sharp focus on yield, purity, and regulatory compliance at each production stage, companies such as Technical Insights underpin the reliable delivery of advanced materials for the global agrochemical industry, supporting both innovation and efficiency in the development of crop protection agents.
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