In the realm of fine chemicals, certain compounds serve as foundational elements for a wide array of industrial applications. 3-Chlorophthalic Anhydride, identified by its CAS number 117-21-5, is one such critical intermediate, recognized for its utility in high-performance materials and as a precursor for pharmaceutical and agrochemical synthesis. For procurement specialists and R&D scientists, a clear understanding of its properties and the market for its supply is indispensable.

Key Properties and Specifications

3-Chlorophthalic Anhydride (C8H3ClO3) is an organic compound with a molecular weight of 182.56 g/mol. It typically presents as a white or pale yellow crystalline powder or in chunk form. Its physical characteristics include a melting point of approximately 123-126 °C and a boiling point of around 170 °C. These properties are crucial for formulators and chemists when designing reaction conditions and ensuring product stability. High purity, often exceeding 98% as determined by Gas Chromatography (GC), is a standard requirement for its demanding applications.

Primary Industrial Applications

The versatility of 3-Chlorophthalic Anhydride stems from its structure, making it a sought-after intermediate for several key industries:

  • Polyimide Engineering Plastics: It is a fundamental component in the synthesis of polyimides. These advanced polymers are prized for their exceptional thermal stability, mechanical strength, and electrical insulation properties, making them essential in aerospace, automotive, and electronics manufacturing.
  • Pharmaceutical Intermediates: In the pharmaceutical sector, 3-Chlorophthalic Anhydride serves as a vital building block for the synthesis of various Active Pharmaceutical Ingredients (APIs). Its specific chemical reactivity allows for the construction of complex molecular structures required for therapeutic drugs.
  • Pesticide Intermediates: The agrochemical industry utilizes this compound as a precursor in the manufacturing of certain pesticides, contributing to the development of effective crop protection solutions.

Finding Reliable Manufacturers and Suppliers

When looking to purchase 3-Chlorophthalic Anhydride, it is imperative to partner with reputable manufacturers and suppliers. Key factors to consider include:

  • Product Quality: Verify that suppliers can consistently provide material meeting the required purity and specifications, supported by Certificates of Analysis (COAs).
  • Supply Chain Stability: Assess the supplier's production capacity and ability to ensure a consistent supply, especially for large-scale industrial needs. Suppliers with substantial production capabilities are often preferred.
  • Pricing and Terms: Competitive pricing, coupled with flexible payment options (e.g., L/C, T/T) and suitable Incoterms (FOB, CIF), are important for procurement efficiency.
  • Logistics: Ensure the supplier offers reliable transportation solutions (Ocean, Land, Air) to meet delivery timelines.

Sourcing from manufacturers in regions like China, known for their robust chemical manufacturing infrastructure, can often provide cost advantages without compromising on quality. Engaging with suppliers for a quote for 3-Chlorophthalic Anhydride (CAS 117-21-5) is a practical step in this process.

We pride ourselves on being a leading manufacturer and supplier of 3-Chlorophthalic Anhydride, committed to delivering high-quality products and reliable service to our global clientele. Contact us to discuss your specific requirements and obtain a quotation for your next purchase.