Pyromellitic Dianhydride PMDA CAS 89-32-7

Whether you require bulk factory direct supply or customized logistical solutions, AECOCHEM ensures consistent quality under strict SOPs. Our PMDA is a critical component for high-temperature plastics and advanced coatings, backed by our expert analytical department and efficient after-sale service.

What is Pyromellitic Dianhydride (PMDA) CAS 89-32-7?

Pyromellitic Dianhydride PMDA CAS 89-32-7, also known as Benzene-1,2,4,5-tetracarboxylic dianhydride, is an acidic anhydride appearing as a white to pale yellow fine powder or crystals. It is a highly reactive chemical intermediate with a molecular formula of C10H2O6.

Known for its exceptional thermal stability and chemical resistance, PMDA is a cornerstone in the production of high-performance polymers. Due to its moisture-sensitive nature, AECOCHEM utilizes specialized packaging (135kg fiber drums) to maintain the 99.5% min assay required for high-end industrial applications.

Key Aspects of Pyromellitic Dianhydride (89-32-7)

Key Applications:

• Polyimides: PMDA is a primary raw material for manufacturing Polyimide (PI) films, resins, and engineering plastics used in aerospace and electronics for their heat-resistant properties.
• Epoxy Curing Agent: It serves as a high-efficiency curing agent for epoxy resins, significantly improving the heat distortion temperature (HDT) and electrical insulation of the final product.
• Polymer Modification: Used as a repair agent and chain extender for PET-based plastics, enhancing the mechanical properties of thermoplastics and specialized coatings.

Physical & Chemical Properties:

• Melting Point: High thermal threshold of 283-286 °C.
• Density: 1.68 g/cm³.
• Appearance: Distinctive white crystalline powder.
• Solubility: Soluble in organic solvents such as dimethyl sulfoxide (DMSO), acetone, and benzene; however, it decomposes in water.

Safety & Identification:

• Hazards: As an acidic anhydride, it is moisture-sensitive and can cause irritation; it must be handled in a ventilated environment.
• Handling: Guard against fire and store in a sealed, dry place.
• Alternative Names: PMDA; 1,2,4,5-Benzene tetracarboxylic acid dianhydride.

Key Advantages of AECOCHEM PMDA

Choosing Pyromellitic Dianhydride PMDA CAS 89-32-7 from AECOCHEM offers several strategic benefits:

• Superior Purity: We guarantee an assay of 99.5% min, which is vital for clear polyimide film production.
• Strict Quality Control: Every batch undergoes complete QC & QA under strict SOPs to ensure low acetone residue (max 1500ppm).
• Cost Efficiency: Our large-capacity production allows us to help clients control costs without compromising on technical specifications.
• Reliable Logistics: With experienced export support, we ensure your Pyromellitic Dianhydride (PMDA) CAS 89-32-7 arrives safely and on time, regardless of your global location.

Frequently Asked Questions (FAQ)

What is the function of PMDA in polyimide synthesis?

In the production of polyimides, Pyromellitic Dianhydride (PMDA) CAS 89-32-7 undergoes a polycondensation reaction with diamines (like ODA) to form polyamic acid, which is then thermally dehydrated into high-strength, heat-resistant polyimide.

Is PMDA hazardous to handle?

Yes, Pyromellitic Dianhydride (PMDA) CAS 89-32-7 is moisture-sensitive and can be irritating to the respiratory system and skin. It should be stored in a cool, ventilated factory warehouse and handled using appropriate PPE.

What is the purity of standard PMDA provided by AECOCHEM?

Our standard commercial grade of Pyromellitic Dianhydride PMDA CAS 89-32-7 features a minimum purity of 99.5%. We also monitor the melting point (286℃ min) to ensure the highest level of reactivity for polymer synthesis.

Some photos of shipment: