For professionals in the pharmaceutical and chemical industries, a thorough understanding of product specifications is fundamental to successful sourcing and application. 3-Cyano-4-isobutoxythiobenzamide (CAS: 163597-57-7) is a critical intermediate used in the synthesis of Febuxostat, and its quality attributes directly influence the efficacy and purity of the final Active Pharmaceutical Ingredient (API). Therefore, grasping its key specifications is essential for anyone looking to buy this compound.

The primary specification that buyers consistently look for is the Assay or Purity. For 3-Cyano-4-isobutoxythiobenzamide, a typical high-quality grade will have a purity of ≥98.0%. This high level of purity is vital to minimize side reactions and ensure that the final Febuxostat product meets stringent pharmaceutical standards. Buyers should always request a Certificate of Analysis (CoA) from their supplier that clearly states the assay and the analytical methods used for its determination.

The Appearance of the product is another key physical characteristic. 3-Cyano-4-isobutoxythiobenzamide is generally described as a yellowish to off-white powder. Variations in color or texture might indicate different processing methods or the presence of impurities, making visual inspection and reference to the supplier's description important.

Understanding the Molecular Formula and Weight is also fundamental. This intermediate has the molecular formula C12H14N2OS, with a molecular weight of approximately 234.31700 g/mol. These details are critical for chemists performing calculations related to reaction stoichiometry and for ensuring the correct compound is being handled.

Other important specifications that suppliers may provide include physical properties such as melting point, boiling point, and flash point, which are indicative of the compound's stability and handling requirements. For instance, its boiling point at 760 mmHg is listed as 396.194°C, and its flash point is 193.411°C, providing insights into its thermal stability and flammability characteristics.

When you plan to purchase 3-Cyano-4-isobutoxythiobenzamide, comparing these specifications across different manufacturers is a standard practice. A detailed understanding of these parameters allows you to make informed decisions, ensuring that the intermediate you buy from a supplier will meet the exacting requirements of your Febuxostat manufacturing process. Prioritizing suppliers who clearly and accurately provide these details will lead to more reliable sourcing and a higher quality final product.