In the realm of chemistry and pharmaceuticals, precise identification is the cornerstone of effective research and reliable manufacturing. Chemical Abstracts Service (CAS) numbers are unique numerical identifiers assigned to chemical substances, providing an unambiguous way to refer to specific compounds. This article highlights the importance of CAS numbers through the example of 1428243-26-8, which corresponds to (3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester, a vital intermediate in the synthesis of Upatinib.

The CAS number 1428243-26-8 serves as a global standard for identifying this particular chemical compound. For pharmaceutical researchers and procurement specialists, correctly referencing this number is crucial when seeking to buy (3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester. It ensures that the intended substance is being sourced, preventing costly errors that can arise from misidentification of chemical intermediates. Reliable sourcing from manufacturers in China, such as NINGBO INNO PHARMCHEM CO.,LTD., relies heavily on accurate CAS number referencing.

Beyond mere identification, the CAS number links to a wealth of chemical information. Knowing that 1428243-26-8 refers to a compound with a white powder appearance, a 99% minimum assay, and a role as a key intermediate in Upatinib synthesis, provides critical context. This detailed chemical information is essential for understanding the compound's utility in API intermediate production and its potential applications in broader organic chemistry. The precise stereochemistry (3R,4S) indicated in its name is directly tied to its CAS registry entry, underscoring the specificity that CAS numbers provide.

The global supply chain for pharmaceutical ingredients is complex, with many specialized intermediates originating from countries like China. NINGBO INNO PHARMCHEM CO.,LTD. exemplifies the expertise found in this region, offering high-quality intermediates like the one identified by CAS 1428243-26-8. When engaging with suppliers, clearly stating the CAS number ensures that both parties are discussing the exact same material, facilitating smooth transactions and quality assurance. This is fundamental for any pharmaceutical R&D chemicals procurement.

In conclusion, CAS numbers are indispensable tools in the chemical industry. For compounds like (3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester, the CAS number 1428243-26-8 acts as a gateway to critical information, enabling efficient and accurate sourcing of vital pharmaceutical intermediates. It reinforces the importance of precision in chemical communication and highlights the value of trusted suppliers like NINGBO INNO PHARMCHEM CO.,LTD. in driving forward drug discovery and development.