In the intricate world of chemical procurement, precise identification is paramount. CAS (Chemical Abstracts Service) Registry Numbers are the universally recognized identifiers for chemical substances. These unique numerical sequences, comprised of three parts separated by hyphens, serve as an indispensable tool for researchers, scientists, and procurement specialists worldwide. They eliminate ambiguity, ensuring that everyone is referring to the exact same chemical entity, regardless of naming conventions or regional variations.

For instance, when a scientist or purchasing agent needs to 'buy' 5-Bromo-4-fluoro-2-methylaniline, referencing its CAS number, 627871-16-3, is the most efficient and accurate method. This numerical code bypasses potential confusion arising from synonyms or trade names. A simple search by CAS number on supplier websites or in chemical databases will yield precise results, showing available specifications, purity levels, and pricing information from various 'manufacturers' and 'suppliers'.

The CAS number acts as a key to unlock critical product details. When looking for a specific intermediate, such as this fluorinated aniline, knowing the CAS number allows procurement managers to quickly compare offerings from different sources. They can easily ascertain if the product is a light brown solid, its molecular formula (C7H7BrFN), and its melting point, ensuring it meets the project's technical requirements. Furthermore, for custom synthesis requests, providing the CAS number of a known related compound can help the service provider understand the target structure more effectively.

The efficiency gained by using CAS numbers in the procurement process cannot be overstated. It speeds up research, reduces the risk of errors, and ultimately contributes to the smooth operation of R&D and production lines. Whether you are sourcing common reagents or highly specialized intermediates, relying on CAS numbers is a fundamental best practice that ensures accuracy and facilitates seamless transactions with chemical 'suppliers' globally.