In the intricate and highly regulated world of chemical procurement and research, precision and unambiguous identification are paramount. Imagine trying to order a specific ingredient for a complex synthesis without a foolproof way to identify it – chaos would ensue. This is where Chemical Abstracts Service (CAS) Registry Numbers, or CAS numbers, come into play. These unique numerical identifiers are the lingua franca of the chemical industry, ensuring that every substance, from common solvents to highly specialized intermediates like 2-methoxy-6-methylpyrimidin-4-ol (CAS: 55996-28-6), can be accurately identified and sourced globally.

What Exactly is a CAS Number?

A CAS number is a unique numeric identifier assigned to a chemical substance by the Chemical Abstracts Service, a division of the American Chemical Society. It consists of up to ten digits, divided into three segments by hyphens. For example, the CAS number for 2-methoxy-6-methylpyrimidin-4-ol is 55996-28-6. The first segment contains two to seven digits, the second segment contains two to eight digits, and the third segment is a single check digit. This system is designed to avoid ambiguity, as different names, synonyms, and even isotopic variations of a chemical can exist.

Why CAS Numbers are Crucial for Procurement and R&D

For procurement managers and R&D scientists, CAS numbers are indispensable tools:

1. Unambiguous Identification: When you search for a chemical, using its CAS number is the most reliable way to ensure you are getting precisely the substance you need. This eliminates confusion arising from multiple common names or trade names. For example, searching for '2-methoxy-6-methyl-1H-pyrimidin-4-one' would lead you to the same CAS number, 55996-28-6, as '2-METHOXY-4-METHYL-6-HYDROXY PYRIMIDINE'.

2. Global Standardisation: CAS numbers are recognized internationally. This facilitates trade and research collaboration across borders. When you approach a supplier, such as NINGBO INNO PHARMCHEM CO.,LTD. in China, providing the CAS number ensures they understand exactly which chemical intermediate you wish to buy.

3. Regulatory Compliance: Regulatory bodies worldwide use CAS numbers to track chemicals for safety, environmental impact, and trade regulations. Accurate identification via CAS numbers is essential for compliance and safety data sheets (SDS).

4. Streamlined Searching and Data Management: Chemical databases, inventory systems, and research literature all rely on CAS numbers for efficient searching and data organization. This speeds up the process of finding information about a compound's properties, suppliers, and applications.

How to Use CAS Numbers When Sourcing

When requesting a quote or placing an order for a chemical intermediate, always include the CAS number. For example, if you are interested in sourcing 2-methoxy-6-methylpyrimidin-4-ol, specifying 'CAS: 55996-28-6' leaves no room for error. Reputable suppliers like NINGBO INNO PHARMCHEM CO.,LTD. will prominently feature CAS numbers in their product listings and documentation. This commitment to accuracy ensures that you receive the exact material required for your manufacturing or research needs, making the entire process from inquiry to purchase seamless and reliable.