PMDA · Pyromellitic Dianhydride

1. Product Information

2. Description

Pyromellitic Dianhydride (PMDA) is a chief material for high-temperature insulation. It is mainly used for the production of polyimide resin, thin film, and insulating paint. It is also a high-temperature curing agent and plasticizer. Some kinds of curing agents for powder coatings are made from it.

3. Technical Data

Property	Value
Appearance	White or Light Yellow
Melting Point	282 – 288 ℃
Neutralization Equivalent	54.5 ± 0.2
Boiling Point	397 – 400 ℃
Content	≥ 99.5%

4. Application

PMDA is used in the production of:

• Polyimide film manufacturing
• Polyimide resin
• Matt hardener / curing agent for powder coatings
• Insulating materials
• Phenolic stabilizers
• Corrosion inhibitors
• Electrofax toner

5. Storage and Packaging

Storage: Keep in a dry and ventilated place, away from moisture, fire, and rain.

Packaging: Corrugated paper barrel, 25 kg/barrel. Inner packing is PE bag. For export, vacuum-bag packaging is used. Store in a cool, dry place, moisture-proof, and away from heat sources.

6. Disclaimer

This information and all further technical advice is based on our present knowledge and experience. However, it implies no liability or other legal responsibility on our part, including with regard to existing third-part intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments.

The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be verified by testing, which should be carried out only by qualified experts in the sole responsibility of a customer. Reference to trade names used by other companies is neither a recommendation, nor does it imply that similar products could not be used.

Key Facts

PMDA (pyromellitic dianhydride; chemical name 1,2,4,5-benzenetetracarboxylic dianhydride, CAS 89-32-7) is a high-performance curing agent and key intermediate manufactured by Huangshan Deping Chemical Co., Ltd. Its EINECS number is 201-898-9, its molecular formula is C10H2O6, and its molecular weight is 218.12 g/mol. PMDA has a content of at least 99.5%, a melting point of 282-288 °C, a boiling point of 397-400 °C, and a neutralization equivalent of 54.5 ± 0.2.

PMDA is mainly used for the production of polyimide film, polyimide resin and insulating materials, and as a high-temperature curing agent. Some curing agents and matting hardeners for powder coatings are made from it. PMDA is packed in corrugated paper barrels of 25 kg with a PE inner bag; vacuum-bag packaging is used for export. It should be stored in a cool, dry, ventilated place, protected from moisture, fire and rain.

Frequently Asked Questions

What is PMDA used for?

PMDA is a chief material for high-temperature insulation: it is used to produce polyimide film, polyimide resin and insulating paint, as a high-temperature curing agent and plasticizer, and as a raw material for some powder coating curing agents and matting hardeners.

What are the key specifications of PMDA?

PMDA has a content of at least 99.5%, a melting point of 282-288 °C, a boiling point of 397-400 °C, and a neutralization equivalent of 54.5 ± 0.2.

What is the difference between PMDA and PMA?

PMA (pyromellitic acid, CAS 89-05-4) is the tetracarboxylic acid and the raw material from which PMDA is produced; PMDA (CAS 89-32-7) is its dianhydride, with a higher content specification (at least 99.5%) and direct use in polyimide materials.

How is PMDA packaged and stored?

PMDA is packed in corrugated paper barrels of 25 kg per barrel with a PE inner bag; vacuum-bag packaging is used for export. Store it in a cool, dry and ventilated place, moisture-proof and away from heat sources, fire and rain.