Description

Pyromellitic Dianhydride CAS NO 89-32-7 is a high-purity, white to off-white crystalline powder that serves as a critical monomer in advanced polymer synthesis. Its rigid, tetrafunctional structure is essential for creating materials with exceptional thermal stability and mechanical properties. This compound is indispensable for manufacturers in the electronics, aerospace, and high-performance plastics industries seeking to produce polyimides, epoxy curing agents, and other specialty polymers.

Application

• Polyimide Resins: Primary monomer for producing high-temperature, high-strength polyimide films, coatings, and adhesives used in flexible printed circuits (FPCs) and aerospace components.
• Epoxy Curing Agents: Used to formulate advanced epoxy resin systems with enhanced heat resistance, chemical stability, and mechanical strength for composite materials.
• Plasticizers: Acts as a precursor for polyester plasticizers, improving the flexibility and durability of PVC and other polymers.
• Powder Coatings: Key ingredient in heat-resistant and durable powder coatings for automotive, industrial, and consumer appliance finishes.
• Liquid Crystal Polymers (LCPs): A vital monomer in the synthesis of LCPs for precision molded parts in electronics and telecommunications.
• Pharmaceutical Intermediates: Serves as a building block in the synthesis of certain complex drug molecules and diagnostic agents.
• Cross-linking Agent: Used to cross-link various polymers, enhancing their thermal and solvent resistance for advanced material applications.

Basic Information

Product Name	Pyromellitic Dianhydride
CAS No.	89-32-7
Molecular Formula	C10H2O6
Molecular Weight	218.12 g/mol
Synonyms	PMDA; 1,2,4,5-Benzenetetracarboxylic Dianhydride; Pyromellitic Acid Dianhydride; Benzene-1,2,4,5-tetracarboxylic Dianhydride; 1,2,4,5-Benzenetetracarboxylic Acid Dianhydride; RCRA Waste Number U190; Benzenetetracarboxylic 1,2,4,5-dianhydride; NSC 137651
EINECS	201-898-9

Quality Control

Our Pyromellitic Dianhydride is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including assay, impurity profile, and physical characterization, to ensure it meets exacting industry and customer-specific specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, guaranteeing traceability, purity, and consistent performance for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent degradation due to atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0 %
Melting Point	284 - 288 °C
Loss on Drying	≤ 0.5 %
Residue on Ignition	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Free Acid (as Pyromellitic Acid)	≤ 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.