In the intricate world of chemical sourcing, precision and reliability are non-negotiable. For procurement managers, R&D scientists, and formulation chemists, verifying the identity and purity of chemical compounds is a critical first step in ensuring the success of their projects and the quality of their final products. Central to this verification process is the CAS Registry Number, a unique numerical identifier assigned to every known chemical substance.

The Chemical Abstracts Service (CAS), a division of the American Chemical Society, assigns these numbers to ensure that there is no ambiguity when referring to a specific chemical compound. A CAS number consists of three parts, separated by hyphens, with the first two parts ranging from two to seven digits, and the last part being a single check digit. For example, a CAS number might look like 123-45-6. This standardized system is globally recognized and is indispensable for scientific literature, patents, safety data sheets, and regulatory documents.

When sourcing chemicals internationally, particularly from manufacturers in China, paying close attention to the CAS number listed for a product is vital. It serves as a crucial identifier that confirms the substance being procured is indeed the one intended. For instance, if a company is looking to buy a specific intermediate or an agricultural chemical, referencing its CAS number ensures they are not receiving a similar but chemically distinct compound. This is especially important when considering chemicals for sensitive applications like pharmaceuticals or specialized industrial processes.

For procurement specialists, utilizing CAS numbers as a search parameter when looking for a chemical manufacturer China can significantly refine their supplier searches and product selections. It allows them to quickly identify suppliers who offer the exact chemical compounds they need. For example, if a company needs to source a specific type of dispersant, such as a chelating dispersant, knowing its CAS number and searching for suppliers who list it can expedite the procurement process.

Furthermore, the CAS number is intrinsically linked to the safety and regulatory compliance of a chemical. Each CAS number is associated with a wealth of information, including its chemical structure, properties, and safety data. By ensuring the CAS number matches the product specifications, buyers can gain confidence in the chemical's purity and its adherence to safety standards. Therefore, when you purchase chemicals, always verify the CAS number as a fundamental step in your quality assurance process. Working with a knowledgeable chemical supplier who readily provides accurate CAS information is a hallmark of a trustworthy partnership.