For any professional engaged in chemical procurement or research and development, a thorough understanding of product specifications is non-negotiable. When it comes to Diethyl Pyrazole-3,5-dicarboxylate (CAS 37687-24-4), a vital intermediate in various synthetic processes, adhering to key specifications ensures successful outcomes and prevents costly errors. This article outlines the critical parameters you should consider before you buy this important chemical.

The molecular formula C9H12N2O4 provides the fundamental composition of Diethyl Pyrazole-3,5-dicarboxylate. However, its practical utility is defined by several physical and chemical properties. Foremost among these is the assay or purity. For most advanced applications, particularly in pharmaceutical and agrochemical synthesis, a purity level of ≥99.0% is generally required. A high assay guarantees that the compound will behave predictably in reactions and minimizes the introduction of unwanted byproducts. Always consult the Certificate of Analysis (CoA) provided by the manufacturer or supplier to confirm the exact purity.

The appearance of Diethyl Pyrazole-3,5-dicarboxylate is typically described as a light yellow crystalline powder. Deviations from this description could indicate degradation, contamination, or improper storage. When you purchase this chemical, visually inspecting it upon arrival and comparing it to the supplier's specifications is a good practice. The form factor—crystalline powder—is also important as it influences handling, dissolution, and reactivity. This physical state is consistent with its melting point.

The melting point of Diethyl Pyrazole-3,5-dicarboxylate is generally reported to be in the range of 55-58°C. This narrow range is another strong indicator of purity. A broad melting range or a significantly different melting point might suggest impurities present in the sample. Researchers often use melting point determination as a quick check for the identity and purity of crystalline organic compounds. When sourcing this material, confirm that the reported melting point aligns with your expectations.

The CAS number (37687-24-4) is a unique numerical identifier assigned by the Chemical Abstracts Service. It is crucial for unambiguous identification of the chemical substance across different databases, regulatory bodies, and scientific literature. When placing an order or requesting a quote from a supplier, always use the CAS number to ensure you are referencing the correct compound. This eliminates confusion, especially with compounds that might have similar synonyms.

Other specifications, such as molecular weight (212.20300) and boiling point (362.5°C at 760 mmHg), while important for theoretical calculations and process design, are often secondary to purity and appearance for procurement purposes. However, understanding these parameters can be beneficial for process chemists. When engaging with a manufacturer or looking to buy online, ensure that the product information clearly lists these essential specifications.

In summary, when you intend to buy Diethyl Pyrazole-3,5-dicarboxylate, pay close attention to its assay (purity), appearance, melting point, and CAS number. By demanding these specifications from your chosen supplier, you ensure the quality and suitability of the chemical for your intended applications, paving the way for successful research and production.