For professionals in the chemical, pharmaceutical, and diagnostic industries, the quality of raw materials is non-negotiable. 2-Cyclohepten-1-one (CAS 1121-66-0) is a key intermediate, and ensuring its quality is paramount for the success of downstream applications. This guide is designed for procurement managers and R&D scientists to understand the essential quality assurance aspects when purchasing this compound from manufacturers and suppliers, particularly those based in China.

The Cornerstone: Purity Levels and Verification

The purity of 2-Cyclohepten-1-one directly impacts its performance in synthesis and formulation. Typically specified with a minimum purity of ≥92% (GC), buyers must ensure that the supplier provides a detailed Certificate of Analysis (COA) with each batch. This document should clearly state the purity, along with other relevant analytical data such as spectral confirmation (e.g., NMR, GC-MS) and identification of any impurities. When you are evaluating a supplier, inquire about their analytical capabilities and the frequency of their quality testing. For critical applications, always seek a supplier that can consistently deliver material meeting or exceeding your specified purity requirements.

CAS Number and Synonyms: Ensuring Correct Identification

Accurate identification is the first step in quality assurance. While 2-Cyclohepten-1-one is the primary name, it is also known by synonyms such as cyclohept-2-en-1-one and tropilene. The CAS number 1121-66-0 is the universally recognized identifier. Before you buy, confirm that the CAS number matches your specifications precisely. Reputable suppliers will clearly list the CAS number and any common synonyms on their product documentation. Misidentification can lead to significant project delays and costly errors.

Choosing a Reliable Manufacturer or Supplier

The choice of manufacturer or supplier significantly influences the consistent availability and quality of 2-Cyclohepten-1-one. When sourcing from China, it is advisable to partner with companies that have a proven track record in producing fine chemicals and intermediates for the global market. Look for suppliers who are transparent about their manufacturing processes, quality control systems, and regulatory compliance. Websites and product catalogs that detail their facilities, certifications (like ISO), and customer testimonials can provide valuable insights. Consider reaching out to multiple suppliers to compare their offerings, pricing, and responsiveness before you make a purchase decision.

Beyond Purity: Storage and Handling Considerations

Quality assurance also extends to the proper storage and handling of 2-Cyclohepten-1-one. Information typically indicates that it should be stored at 2-8°C to maintain its stability. Suppliers should provide clear guidance on recommended storage conditions and handling precautions, often detailed in the Safety Data Sheet (SDS). When you purchase from a supplier, ensure their packaging and shipping methods are designed to preserve the product's integrity during transit. Adherence to these conditions by both the manufacturer and yourself is crucial for maintaining the chemical's quality from production to application.