For professionals in the chemical and pharmaceutical industries, the quality of raw materials directly impacts the success of synthesis and the integrity of final products. 4-Chlorobenzoic Acid (CAS 74-11-3) is a key intermediate, and understanding its specifications is crucial for making informed purchasing decisions. This guide focuses on the quality assurance aspects and specifications that buyers should prioritize when sourcing this compound from manufacturers and suppliers.

Key Specifications for 4-Chlorobenzoic Acid

When evaluating a supplier for 4-Chlorobenzoic Acid, pay close attention to the following critical specifications:

  • Appearance: The compound is typically described as a 'White powder'. Any significant deviation from this standard appearance could indicate impurities or improper handling.
  • Assay (Purity): This is arguably the most critical parameter. For most applications, especially in pharmaceuticals and fine chemicals, an assay of ≥99% is expected. Manufacturers will provide this information on their Certificate of Analysis (CoA). High assay values ensure that the compound will perform as expected in reactions, minimizing side reactions and product contamination.
  • Melting Point: The specified melting point range, typically 140-143°C, serves as another indicator of purity. A broad or significantly lower melting point can suggest the presence of impurities.
  • Insoluble Matter: The level of insoluble matter, often specified as ≤0.02% in sodium carbonate solution, indicates the cleanness of the product. High levels of insoluble matter can interfere with reaction processes.
  • Chloride Content (as Cl): A low chloride content, such as ≤0.01%, is important to prevent unwanted chlorination reactions or by-products, especially in sensitive synthesis.
  • Residue on Ignition: This test measures the inorganic impurity content. A low residue on ignition (e.g., ≤0.1%) signifies a cleaner product with fewer inorganic contaminants.

The Importance of Certificates of Analysis (CoA)

A Certificate of Analysis is an official document provided by the manufacturer that verifies the product meets the stated specifications. When you buy 4-Chlorobenzoic Acid, always request a CoA for each batch. This document is essential for:

  • Quality Verification: It confirms that the batch you received matches the required purity and chemical characteristics.
  • Regulatory Compliance: For pharmaceutical and regulated industries, CoAs are mandatory for batch traceability and compliance with Good Manufacturing Practices (GMP).
  • Supplier Accountability: It holds the manufacturer accountable for the quality of their product.

Working with NINGBO INNO PHARMCHEM CO.,LTD.

As a leading supplier and manufacturer, we understand the stringent demands of the industries we serve. We ensure that our 4-Chlorobenzoic Acid not only meets but often exceeds the specified quality parameters. By partnering with us, you gain access to a reliable supply of high-purity 4-Chlorobenzoic Acid, backed by comprehensive documentation and a commitment to quality. For any inquiries regarding specifications, pricing, or to request a quote for bulk purchases, please contact our sales team.