Hangzhou Leap Chem Co., Ltd. is one of the most professional manufacturers and suppliers of 1,2,4,5-benzenetetracarboxylic anhydride丨cas 89-32-7 in China. Welcome to wholesale bulk high quality chemical products at competitive price from our factory. If you have any enquiry about custom service, please feel free to email us.
Specifications
| Appearance: | White crystal |
| Assay: | 99.5% min |
| Neutralization equivalent: | 54.3–54.7 |
| Free acid: | 0.5% max |
| Melting point: | 286.0–288.0℃ |
Transport Information
|
Parameter |
Specification |
|
UN Number |
3077 |
|
Class |
|
|
Packing Group |
|
|
H.S. Code |
2917399090306 |
|
Stability & Reactivity |
The product is chemically stable under standard ambient conditions. |
|
Storage |
Tightly closed. Store in a closed, dry, ventilated place |
|
Condition to Avoid |
Moisture |
|
Package |
Applications
1. Polyimide Resin Synthesis
PMDA is a key dianhydride monomer in the production of polyimides, high-performance thermoplastics known for:
Exceptional thermal stability
Mechanical strength
Electrical insulation
Polyimides are used in aerospace, automotive, flexible electronics, and advanced insulation films (e.g., Kapton®).
2. Epoxy Resin Curing Agent
Functions as a hardening agent or co-curing agent for epoxy resins, improving:
Chemical resistance
Thermal performance
Adhesion strength
3. Adhesives and Coatings
Forms heat-resistant, chemically inert films.
Common in protective coatings, especially for metal and electronic surfaces.
4. Polyester and Alkyd Resin Modifier
Incorporated into alkyd and polyester resins to enhance hardness and chemical resistance of the final polymer.
5. Composite Materials
Widely used in the composite sector, especially as a matrix resin component for advanced fiber-reinforced materials.
6. Pharmaceutical and Dye Intermediates
PMDA serves as a building block in specialty chemical synthesis, particularly where rigid aromatic frameworks are needed.
Benefits
Thermal Stability: One of the most thermally stable anhydrides available, critical for high-heat applications.
High Reactivity: The anhydride groups are highly reactive toward amines and alcohols, facilitating diverse polymerizations.
Excellent Dielectric Properties: Essential for microelectronics and insulating films.
Versatility: Compatible with a wide range of diamines and diols, making it suitable for custom polymer formulations.
Conclusion
1,2,4,5-Benzenetetracarboxylic anhydride (PMDA, CAS 89-32-7) is a high-purity aromatic dianhydride critical to the production of high-performance polymers like polyimides. Its thermal and chemical stability, reactivity, and electrical insulation properties make it a foundational material in industries including aerospace, electronics, and advanced coatings. As demand grows for durable and heat-resistant materials, PMDA continues to be a strategic chemical in modern material science and industrial chemistry.
