In the chemical industry, precision and unambiguous identification are critical for safe handling, regulatory compliance, and effective procurement. The Chemical Abstracts Service (CAS) Registry Number is the standard system for uniquely identifying chemical substances. For B2B procurement managers and R&D scientists, understanding the significance of CAS numbers is fundamental when sourcing chemicals. This guide delves into the importance of CAS numbers, using 1-Butyl-4-methylpyridinium Hexafluorophosphate (CAS 401788-99-6) as a prime example to illustrate best practices when you purchase chemicals.

A CAS number is a unique numerical identifier, consisting of three parts separated by hyphens. For instance, the CAS number 401788-99-6 precisely identifies 1-Butyl-4-methylpyridinium Hexafluorophosphate. This number is crucial because it eliminates ambiguity associated with different naming conventions, synonyms, or proprietary product codes. When you search for a specific chemical, such as this pyridinium ionic liquid, using its CAS number ensures you are looking at the correct substance. This is vital for chemical formulation, synthesis planning, and ensuring safety data sheets (SDS) are accurate for the product you intend to buy.

When engaging with chemical suppliers and manufacturers, particularly those in international markets like China, always cross-reference the CAS number provided with your required specifications. A reputable manufacturer will readily provide the correct CAS number and associated documentation, such as a Certificate of Analysis (CoA), which often includes the CAS number and purity data (e.g., for 1-Butyl-4-methylpyridinium Hexafluorophosphate, ≥95% HPLC). This diligence helps prevent costly errors and ensures the quality of the chemicals you procure.

For procurement professionals aiming to purchase chemicals efficiently, searching by CAS number is often more effective than using chemical names alone, which can have multiple variations. If you are looking to buy 1-Butyl-4-methylpyridinium Hexafluorophosphate, a search that includes 'CAS 401788-99-6' will yield more precise results from suppliers. When you contact a manufacturer for a quote, confirming the CAS number and its associated specifications is a standard part of the inquiry process. This also aids in regulatory compliance, as many import/export regulations rely on CAS numbers for identification.

In conclusion, mastering the use of CAS numbers is an indispensable skill for anyone involved in chemical sourcing and management. By diligently verifying CAS numbers and collaborating with trusted chemical manufacturers and suppliers, professionals can ensure accurate procurement, maintain product quality, and streamline their operations. For your next requirement of specialty chemicals like 1-Butyl-4-methylpyridinium Hexafluorophosphate, make sure the CAS number 401788-99-6 is clearly stated and confirmed with your supplier.