In the vast and complex world of chemistry, precise identification is paramount. Whether for scientific research, industrial manufacturing, or regulatory compliance, knowing exactly which chemical substance you are dealing with is the first and most critical step. This is where the Chemical Abstracts Service (CAS) Registry Number, commonly known as the CAS number, plays an indispensable role. For any chemical compound, its CAS number is a unique numerical identifier, analogous to a fingerprint, that eliminates ambiguity and facilitates accurate communication globally.

Take, for instance, the compound (Z)-Methyl 2-(tert-butoxycarbonylamino)but-2-enoate. Without its specific identifier, searching for this substance could lead to confusion. Is it the Z isomer or the E isomer? Is it the methyl ester or an ethyl ester? The CAS number, 63658-16-2 for this particular compound, resolves these questions instantly. When a procurement specialist searches for 'CAS 63658-16-2,' they are unequivocally targeting this specific chemical entity, ensuring that the quotes and samples they receive are for the correct material.

The significance of CAS numbers extends beyond mere identification. They are crucial for several aspects of chemical procurement and management. Firstly, they ensure accuracy in ordering. A buyer looking to purchase high-purity (Z)-Methyl 2-(tert-butoxycarbonylamino)but-2-enoate (minimum 97%) can include 'CAS 63658-16-2' in their request to guarantee they receive the specified compound. This is vital for industries like pharmaceuticals, where using the wrong intermediate can have catastrophic consequences.

Secondly, CAS numbers facilitate regulatory compliance and safety. Material Safety Data Sheets (MSDS) and other safety documentation are invariably linked to the CAS number, providing essential information on hazards, handling, storage, and emergency procedures. When importing or exporting chemicals, or when dealing with hazardous substance inventories, the CAS number is the standard reference for customs and regulatory bodies worldwide. For example, understanding the safety protocols for storing compounds like (Z)-Methyl 2-(tert-butoxycarbonylamino)but-2-enoate, which may require cool temperatures (2-8°C), is directly tied to its accurate identification via its CAS number.

Thirdly, CAS numbers enhance research and database searches. Scientific literature, chemical databases, and supplier catalogs all utilize CAS numbers for efficient retrieval of information. A researcher seeking to understand the synthesis pathways or applications of (Z)-Methyl 2-(tert-butoxycarbonylamino)but-2-enoate can use 'CAS 63658-16-2' to find relevant studies, patents, and supplier listings quickly. This efficiency is invaluable in fast-paced R&D environments.

Finally, for manufacturers and suppliers, listing the CAS number prominently on product pages and in quotations streamlines the sales process. It acts as a universal language that removes guesswork for buyers globally. When you see 'CAS 63658-16-2' associated with a product listing, it signifies that the supplier is providing a distinct, verifiable chemical entity. Therefore, always ensure that the CAS number is part of your chemical procurement process to guarantee accuracy, safety, and efficiency.