For B2B buyers in the chemical and pharmaceutical industries, understanding the critical specifications of chemical intermediates is essential for successful procurement and product development. Two fundamental aspects are the Chemical Abstracts Service (CAS) registry number and the purity of the compound. These identifiers ensure accuracy, traceability, and the reliability of materials used in research, development, and manufacturing. Let's consider 2-Hydroxy-5-(1,2,2-triphenylvinyl)benzaldehyde (CAS 1926206-27-0) as a case study.

The CAS number, in this instance 1926206-27-0, is a unique numerical identifier assigned to a specific chemical substance. It serves as a universal language in the chemical industry, eliminating ambiguity and facilitating easy referencing across databases, scientific literature, and supplier catalogs. For procurement managers, having the correct CAS number is the first step in accurately identifying and ordering the precise chemical intermediate required, whether it's for synthesizing new drugs, developing advanced materials, or producing fine chemicals. When searching for a manufacturer or supplier, using the CAS number ensures that you are looking for the exact compound, preventing costly errors.

Equally critical is the purity specification. For intermediates like 2-Hydroxy-5-(1,2,2-triphenylvinyl)benzaldehyde, manufacturers often list a minimum purity percentage, such as 97% Min. This specification indicates the concentration of the desired compound in the delivered product, with impurities making up the remainder. For applications in sensitive fields like pharmaceuticals or electronics, higher purity is often mandatory, as even trace amounts of contaminants can negatively impact reaction yields, product performance, or biological activity. Buyers should always scrutinize the purity levels and request a Certificate of Analysis (CoA) that details the analytical methods used (e.g., HPLC, GC) and the specific impurity profile.

When sourcing intermediates from international manufacturers, particularly those in China, understanding these specifications becomes even more important. Reputable suppliers will clearly state both the CAS number and the purity. They will also often provide other relevant information, such as the physical appearance (e.g., solid), molecular formula, and recommended storage conditions. For buyers, it is advisable to leverage these details to their full extent. Inquiring about the price for bulk quantities and the availability of free samples for verification are standard procurement practices. These steps not only help in securing a competitive price but also in validating the quality and suitability of the chemical intermediate before committing to a large purchase.

In summary, for any B2B buyer dealing with chemical intermediates, a thorough understanding of CAS numbers and purity specifications is fundamental. It ensures accurate identification, facilitates effective sourcing from global manufacturers, and ultimately contributes to the successful execution of research and production objectives. By prioritizing these details, procurement professionals can confidently navigate the complex chemical market and secure the high-quality materials necessary for innovation.