Phthalic anhydride, known chemically as PA and identified by CAS number 85-44-9, is a foundational chemical intermediate that underpins numerous critical industrial applications. As a prominent manufacturer and supplier based in China, we specialize in providing high-purity Phthalic Anhydride (99.5%), catering to the evolving needs of global industries. Understanding the versatility and importance of PA is key for procurement managers and R&D scientists seeking reliable chemical raw materials.

The primary demand for Phthalic Anhydride stems from its role in the synthesis of phthalate esters. These esters, such as Di(2-ethylhexyl) phthalate (DEHP), are widely employed as plasticizers. Plasticizers are vital additives that impart flexibility, workability, and durability to polymers, most notably Polyvinyl Chloride (PVC). Without these plasticizers, PVC would be rigid and brittle, limiting its use. Industries relying on flexible PVC components, including wire and cable insulation, automotive interior parts, roofing membranes, and medical devices, depend heavily on a consistent supply of high-quality PA.

Beyond plasticizers, Phthalic Anhydride is a critical building block for a variety of resins. Its reaction with polyols yields polyarylate resins, which are integral to the paint and coatings industry, providing durability and gloss. Furthermore, condensation with unsaturated acids and glycols produces unsaturated polyester resins (UPR). UPRs, especially when reinforced with glass fibers, form strong and lightweight composite materials used extensively in marine construction, automotive body panels, and consumer goods. For manufacturers in these sectors, understanding how to buy phthalic anhydride that meets specific resin production requirements is paramount.

The application spectrum of Phthalic Anhydride extends to the production of dyes and pigments. Its chemical structure allows for the synthesis of various colorants, contributing to the vibrant hues seen in textiles, printing inks, and paints. As a specialty chemical intermediate, PA also finds its way into the manufacturing of certain pharmaceuticals, herbicides, insecticides, and flame retardants, underscoring its broad chemical utility.

For businesses seeking a dependable source for Phthalic Anhydride, partnering with a reputable manufacturer in China offers significant advantages. We pride ourselves on our advanced production capabilities, stringent quality control, and competitive pricing. Whether you are looking to purchase Phthalic Anhydride for large-scale plasticizer production or for niche applications in specialty resins, our team is ready to provide technical support and secure your supply chain. Contact us today to inquire about our Phthalic Anhydride price and to request a sample, ensuring your manufacturing processes have access to this indispensable chemical intermediate.