In the intricate world of chemical procurement, especially within the pharmaceutical sector, precise identification of substances is not just a matter of convenience but a fundamental requirement for safety, compliance, and effective research. This is where Chemical Abstracts Service (CAS) Registry Numbers, commonly known as CAS numbers, play an indispensable role. These unique numerical identifiers are the global standard for distinguishing chemical compounds, ensuring that scientists, manufacturers, and regulators are all speaking the same language.

A CAS number is a sequence of digits separated by hyphens, typically in the format of XXXX-XX-X. For instance, a specific pharmaceutical intermediate might be known by its CAS number, such as 1350514-68-9. This numerical string is assigned to a single, specific chemical substance. This means that if you are looking to buy Active Pharmaceutical Ingredient 1350514-68-9, referencing its CAS number is the most unambiguous way to ensure you are sourcing the correct material. It eliminates confusion that can arise from multiple common names, synonyms, or trade names that a single chemical might possess.

The importance of CAS numbers is particularly pronounced in pharmaceutical development and manufacturing. When R&D scientists are designing synthesis pathways or when procurement managers are sourcing raw materials, using the correct CAS number is critical. It ensures that the intended chemical is being ordered, preventing costly mistakes and potential safety hazards. For example, a slight variation in a chemical structure, even if the common name is similar, can drastically alter its properties and suitability for pharmaceutical applications. The CAS number provides an absolute point of reference.

Manufacturers and suppliers worldwide, including those specializing in pharmaceutical intermediates and APIs in China, universally use CAS numbers in their product listings and documentation. When you search for a particular chemical, such as Active Pharmaceutical Ingredient 1350514-68-9, you will invariably find its CAS number prominently displayed. This allows buyers to quickly verify that the product offered by a supplier matches their requirements. Requesting a Certificate of Analysis (CoA) that includes the CAS number further solidifies the identification and quality assurance of the purchased chemical.

Understanding and utilizing CAS numbers effectively is a cornerstone of efficient and safe chemical sourcing. It empowers buyers to communicate precisely with suppliers, compare products accurately, and navigate the vast chemical landscape with confidence. Whether you are a seasoned researcher or new to pharmaceutical procurement, always make the CAS number your primary identifier when searching for and purchasing chemical substances. If you need to purchase pharmaceutical intermediates, ensuring you have the correct CAS number is your first step towards a successful transaction with a trusted manufacturer.