In the vast landscape of chemical compounds, accurate identification is paramount for research, manufacturing, and trade. The Chemical Abstracts Service (CAS) Registry assigns a unique numerical identifier to every chemical substance, known as a CAS Registry Number. For DL-Ethyl 2-bromobutyrate, this identifier is 533-68-6. Understanding the significance of this CAS number, along with the properties of the compound it represents, is essential for anyone involved in its procurement or use.

DL-Ethyl 2-bromobutyrate, identified by CAS 533-68-6, is a chiral alpha-bromo ester. In its racemic (DL) form, it is a clear, colorless to slightly yellow liquid. Its molecular formula is C6H11BrO2, and it possesses a molecular weight of approximately 195.05 g/mol. Key physical properties often cited include a boiling point of around 179.4 °C at atmospheric pressure and a density of approximately 1.348 g/cm³. These specifications are crucial for chemists and engineers when designing reactions or handling the material. When searching for this compound, using the CAS number 533-68-6 ensures you are referencing the exact substance, avoiding confusion with similar chemicals.

The primary application of DL-Ethyl 2-bromobutyrate is as an intermediate in organic synthesis. Its reactive bromine atom makes it a valuable alkylating agent and a precursor for introducing the 2-oxobutyl group into other molecules. This versatility makes it important in the synthesis of pharmaceuticals, agrochemicals, and various specialty chemicals. For example, it serves as a building block in creating more complex ester or amide derivatives. The purity of DL-Ethyl 2-bromobutyrate, often specified as 99%, is critical for its effectiveness in these applications, and suppliers will typically provide the CAS number prominently on product listings.

For procurement professionals, using the CAS number 533-68-6 is the most reliable way to search for DL-Ethyl 2-bromobutyrate from manufacturers and suppliers worldwide. This standardized identifier eliminates ambiguity and ensures that you are requesting quotes and placing orders for the correct chemical. When you contact a DL-Ethyl 2-bromobutyrate supplier, confirming the CAS number is a fundamental part of the inquiry process. Whether you are looking to buy small research quantities or large industrial batches, always verify the CAS number to guarantee you receive the precise chemical intermediate needed for your specific application.