In the precise world of chemical procurement, universally recognized identifiers are indispensable for ensuring accuracy and preventing costly errors. The Chemical Abstracts Service (CAS) Registry Number, commonly known as a CAS number, serves this critical function. For professionals sourcing chemical compounds, particularly pharmaceutical intermediates, understanding and utilizing CAS numbers is a fundamental skill.

Let's consider 1-(4-Iodophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one, a vital intermediate used in the synthesis of Apixaban. Its unique CAS number is 473927-69-4. This specific numerical identifier guarantees that you are referring to the exact chemical substance, eliminating ambiguity that can arise from varying synonyms or trade names. When you search for this compound from a manufacturer or supplier, including its CAS number in your query is the most efficient way to find precise information.

For instance, if you are looking to buy this specific intermediate, searching for '1-(4-Iodophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one CAS 473927-69-4' will yield more accurate results than just the chemical name. This is especially true when dealing with multiple potential suppliers, many of whom operate from countries like China, where clear communication is key. A reliable supplier in China will always list the CAS number prominently for their products.

The CAS number also plays a crucial role in regulatory compliance and safety data sheet (SDS) retrieval. When requesting a quote or information about price for a chemical, confirming the CAS number ensures that the information provided pertains to the correct substance. This is vital for any research and development or manufacturing process.

Procurement professionals must always verify that the CAS number provided by the manufacturer matches their requirements. This diligence ensures that you receive the exact material needed for your applications, whether it's a general chemical or a specialized pharmaceutical intermediate. By making CAS numbers a standard part of your sourcing checklist, you enhance the accuracy of your purchase orders and strengthen your supply chain reliability.

In summary, the CAS number is more than just a label; it's a key that unlocks precise chemical identification, facilitating accurate sourcing, clear communication with suppliers, and ultimately, the success of your chemical-dependent operations.