PMA · Pyromellitic Acid
Product No. 101 P 206 · High-purity intermediate for curing agents and specialty chemicals.
1. Product Information
2. Description
Pyromellitic Acid (PMA) is the raw material of Pyromellitic Dianhydride (PMDA). It is also used as a key raw material in the production of Curing Agents / Matt Hardeners MB68 and MB55 for powder coatings.
3. Technical Data
| Property | Value |
|---|---|
| Appearance | White or Light Yellow |
| Melting Point | 281 – 284.5 ℃ |
| Neutralization Equivalent | 63 ± 0.5 |
| Content | ≥ 99% |
4. Application
PMA is used in the production of:
- Pyromellitic Dianhydride (PMDA)
- TOPM (trimellitic anhydride derivatives)
- Dull curing agents for powder coatings as a main raw material
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
PMA (pyromellitic acid; chemical name 1,2,4,5-benzenetetracarboxylic acid, CAS 89-05-4) is a high-purity chemical intermediate manufactured by Huangshan Deping Chemical Co., Ltd. Its EINECS number is 201-879-5, its molecular formula is C10H6O8, and its molecular weight is 254.15 g/mol. PMA has a content of at least 99%, a melting point of 281-284.5 °C, and a neutralization equivalent of 63 ± 0.5.
PMA is the raw material of pyromellitic dianhydride (PMDA) and a key raw material for the powder coating matting hardeners MB68 and MB55. It is also used in the production of TOPM and in polyimide and specialty polymer applications. PMA 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 PMA (pyromellitic acid) used for?
PMA is the raw material for producing pyromellitic dianhydride (PMDA) and a main raw material for dull (matting) curing agents for powder coatings, including MB68 and MB55. It is also used for TOPM and specialty polymers.
What is the relationship between PMA and PMDA?
PMDA is produced from PMA: pyromellitic acid (CAS 89-05-4) is the acid raw material, and pyromellitic dianhydride (PMDA, CAS 89-32-7) is its dianhydride, used as a high-temperature curing agent and polyimide intermediate.
What are the key specifications of PMA?
PMA has a content of at least 99%, a melting point of 281-284.5 °C, and a neutralization equivalent of 63 ± 0.5. It appears as a white or light yellow solid.
How is PMA packaged and stored?
PMA 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.