Product Introduction
Pyromellitic Dianhydride (PMDA) is an important organic chemical intermediate with the molecular formula C₁₀H₄O₆. The pure product is a white or slightly yellow crystal. When exposed to moist air, it rapidly absorbs moisture and hydrolyzes into pyromellitic acid.
Product Properties
|
Product Name： |
Pyromellitic dianhydride (PMDA) |
|
CAS No.： |
89-32-7 |
|
Molecular Formula: |
C10H2O6 |
|
Structural formula: |
|
Product Indedx
|
Item |
PMDA 99.5% |
PMDA 98% |
|
Appearance: |
White crystalline powder |
white or slightly yellow crystal |
|
Assay: |
≥99.5% |
98% |
|
Melting Point: |
284℃-288℃ |
282-286℃ |
|
Free acid content: |
≤0.5% |
_ |
|
Acetone Residue |
≤1200 ppm |
_ |
Product advantages of 99.5% Pyromellitic dianhydride (PMDA )
1. Our purified PMDA is a refined product obtained through the gas-phase catalytic oxidation of the raw material Durene, followed by dissolution in acetone and recrystallization. This process make sure that our goods have the better stability of product quality and a more competitive price advantage.
2. The particle size of our product is uniform, with particles larger than 500 µm are no more than 5%, and particles smaller than 80 µm are no more than 5%. Below is the particle size distribution diagram:
3.The content of the actual goods exported by us has reached high purity above 99.9%, and the acetone residue is controlled below 1000 ppm.
Product Application
PMDA is primarily used as a raw material for polyimide production, as a curing and polishing agent for epoxy resin, and as a crosslinking agent for polyester resin.
PMDA is also employed in the manufacture of polyimide films, polyimide resins, powder coating matte agents, and advanced electrical insulation materials.
Additionally, it is used to produce polyimide resins, high-temperature-resistant electrical insulating paints, PVC plasticizers, synthetic resin crosslinking agents, and epoxy resin curing agents. It is also used in the production of phthalocyanine blue dye, among other applications.
Product Packaging & Storage
Packaging:
1.The product is packed in high pressure PE bag with aluminum foil bag outside, then placed in drums with pallets, with a net weight of 25 kg or 135 kg.
25kg/drum with pallets,450 kg/pallet*20,9000 kg/20 FCL.
135kg/drum with pallets,540kg/pallet*20,10800 kg/20FCL.
2. Customized packaging options are also available according to customer requirements.
Storage:
It should be stored in a cool, dry place, with strict sealing for preservation and moisture protection.
FAQ
Q: When PMDA is exported, is it classified as general goods or dangerous goods?
A: PMDA is classified as ordinary goods for sea transport. However, since it is listed as a dangerous chemical in China, it must undergo commodity inspection during export.
Q: How many times does acetone need to be filtered during the refining process?
A: Four or five times is sufficient.
Q: If the customer has special requirements for the particle size, can we customize it according to their needs?
A: Yes, we can provide customized particle sizes based on the customer's specific requirements, but the price will be higher.
Hot Tags: pyromellitic dianhydride, China pyromellitic dianhydride manufacturers, suppliers, factory, polyamic acid of pyromellitic dianhydride, Brominated Styrene Butadiene Copolymer, CAS141-53-7, EINECS 211 263 8, EINEC 200 880 8, ammonium chloride for ptc
