NINGBO INNO PHARMCHEM CO.,LTD. emphasizes the importance of robust analytical techniques to ensure the high quality of Benzenesulfonyl Chloride (CAS 98-09-9). For its diverse applications in pharmaceuticals, agrochemicals, and fine chemical synthesis, purity is paramount. Understanding how to assess the quality of this intermediate is key for manufacturers and researchers.

One of the fundamental methods for initial assessment involves physical property analysis. The characteristic properties of Benzenesulfonyl Chloride, such as its melting point (around 14.5-17°C) and boiling point (251-252°C), can provide a quick indication of purity. Deviations from these established values often suggest the presence of impurities.

For more precise quantitative analysis, chromatographic techniques are indispensable. Gas Chromatography-Mass Spectrometry (GC-MS) is frequently employed to identify and quantify volatile impurities that might arise during benzenesulfonyl chloride synthesis. High-Performance Liquid Chromatography (HPLC) with UV detection is also widely used, particularly for analyzing less volatile impurities or for direct assay of the product. The benzenesulfonyl chloride applications in analytical chemistry itself, as a derivatizing agent, also highlight the need for its own purity assessment.

Spectroscopic methods offer further insights into the molecular structure and purity. Infrared (IR) spectroscopy can confirm the presence of characteristic functional groups, such as the sulfonyl chloride group (S=O stretch around 1370 cm⁻¹ and S-Cl stretch around 580 cm⁻¹). Nuclear Magnetic Resonance (NMR) spectroscopy, particularly ¹H and ¹³C NMR, provides detailed structural information and can detect even trace amounts of organic impurities by analyzing chemical shifts and integration patterns.

Titration methods, such as acid-base titration, can be used to quantify residual acidic impurities, like benzenesulfonic acid, which can form from hydrolysis. This is a crucial step in quality control, especially for materials intended for sensitive downstream applications.

NINGBO INNO PHARMCHEM CO.,LTD. employs a comprehensive suite of these analytical techniques to guarantee the quality of its Benzenesulfonyl Chloride. By adhering to stringent quality control measures and providing detailed Certificates of Analysis, we ensure that our customers receive a product that meets their exact specifications, supporting reliable benzenesulfonyl chloride applications in their respective fields. Knowing the exact benzenesulfonyl chloride price reflects the investment in these quality assurance processes.