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In the chemical industry, especially within pharmaceutical and fine chemical sectors, precise identification of substances is paramount. This is where the Chemical Abstracts Service (CAS) Registry Number, commonly known as a CAS number, plays an indispensable role. A CAS number is a unique numerical identifier assigned to every chemical substance described in the open scientific literature. For procurement managers and researchers, understanding and utilizing CAS numbers is fundamental to accurate sourcing and effective communication.
Each CAS number consists of three parts, separated by hyphens, with the first two parts indicating the number of atoms in the registry number, and the last part serving as a check digit. For instance, the CAS number 136522-17-3 uniquely identifies the compound (3S,4a,8aS)-2-[(2R,3S)-3-Amino-2-hydroxy-4-phenylbutyl]-N-tert-butyldecahydroisoquinolin-3-carboxamide. When searching for specific chemicals, using the CAS number is far more reliable than relying solely on chemical names, which can have multiple synonyms or variations. This is particularly true for complex molecules like pharmaceutical intermediates, where subtle differences in nomenclature can lead to confusion.
For buyers looking to purchase chemical products, incorporating the CAS number into their search queries significantly narrows down results and ensures they are targeting the exact substance required. Phrases like 'buy CAS 136522-17-3' or 'pharmaceutical intermediate CAS number search' will lead directly to relevant product listings from manufacturers and suppliers. This precision is vital in the pharmaceutical industry, where product integrity is critical for drug safety and efficacy. A supplier's ability to readily provide the correct CAS number and associated documentation (like CoAs) is a strong indicator of their professionalism and commitment to quality.
Manufacturers and suppliers also leverage CAS numbers extensively for inventory management, regulatory compliance, and customer service. When you inquire about a product, providing the CAS number ensures that the supplier understands your exact needs. Therefore, always make it a practice to use CAS numbers in your procurement processes. If you are in the market for (3S,4a,8aS)-2-[(2R,3S)-3-Amino-2-hydroxy-4-phenylbutyl]-N-tert-butyldecahydroisoquinolin-3-carboxamide, using its CAS number, 136522-17-3, will streamline your search and help you connect with reliable suppliers who can provide the quality product you need.
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to Global Customers
1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
2. Own R&D laboratory, pilot platform and large-scale production workshop, which can meet the audit requirements of global customers;
3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
A: We don't have Minimum Order Quantity, exact quantity should be provided before quotation for us to calculate the exact cost.
A: We don't provide free samples due to lots of request and expensive international courier's cost, we can deduct the sample charge after commercial order placed.
A: Our payment terms: Small or sample order: T/T IN ADVANCE. Commercial order: First order should be by T/T IN ADVANCE or L/C at sight, and following orders T/T 30~90days is acceptable subject to approval of credit application.
