Unilong is manufacturer of 3,3′,4,4′-Biphenyltetracarboxylic dianhydride (BPDA, CAS 2420-87-3), high purity & low metal grade, samples available for export.
CAS: 2420-87-3
Molecular Formula: C16H6O6
Molecular Weight: 294.22
EINECS: 219-342-9
Synonyms: 3,3′,4,4′-Biphenyltetracarboxylic dianhydride 97%; 4,4′-Biphthalic Anhydride (purified by sublimation); 3,3’4,4′-Biphenyl tetracarboxylic acid dianhydride(s-BPDA); S-BDPA; S-BPDA;
3,3′,4,4′-Biphenyltetracarboxylic dianhydride BPDA (CAS 2420-87-3) is an important polyimide monomer material with wide applications in the synthesis of high-temperature resistant polyimide materials. BPDA is a white to off-white crystalline powder. Used for the production of polyimide products and their composite materials, pharmaceutical intermediates
| Item | Specification |
| Other Name | 4,4′-Biphthalic Anhydride 2420-87-3 |
| Density | 1.625±0.06 g/cm3(Predicted) |
| Melting point | 299-305 °C (lit.) |
| λmax | 300nm(lit.) |
| Purity | 99% |
| Storage conditions | Inert atmosphere,Room Temperature |
1. Flexible Electronics (Main Applications): FPC flexible circuit boards, COF, OLED/Mini LED flexible display substrates, chip passivation insulating films, carrier tapes, low thermal expansion, stable size at high temperatures, and not prone to warping.
2. Microelectronics and Semiconductors: Packaging insulating layers, photolithography-compatible PI materials, electronic-grade low-metal specifications suitable for high-precision processes.
3. New Energy: Lithium battery high-temperature resistant separators, insulation substrates for energy storage devices, flexible photovoltaic substrates.
4. Office Equipment: Printer fixing tapes, transfer tapes, high-temperature resistant transmission films, speaker diaphragms.
5. Others: High-temperature resistant anti-corrosion coatings, special separation membranes, high-performance engineering plastics.
1. The rigid and symmetrical biphenyl structure has extremely strong thermal stability, with a high heat decomposition temperature and a high Tg, and is resistant to long-term high-temperature aging.
2. Low thermal expansion coefficient CTE, excellent dimensional stability, and easy to avoid warping during high-temperature processing.
3. Strong mechanical properties: high modulus, high tensile strength, and good film toughness.
4. Low metal ions, high purity grade, suitable for semiconductor and high-end electronic fields, reducing the risk of leakage.
5. Resistance to chemical corrosion, resistance to solvents, and excellent insulation performance.
6. Compared with other similar products: The BPDA system has higher rigidity and modulus, suitable for scenarios with strict requirements for dimensional stability.
Our factory’s advantages
Standard packaging: 20kg / 25kg cardboard barrels (fiber barrels), inner layer PE bag + aluminum foil sealed bag, strictly moisture-proof; 4,4′-Biphthalic anhydride can be customized in small packages as needed (sample packaging)
Environment: BPDA CAS 2420-87-3 should be stored in a cool, dry, and ventilated warehouse with a temperature of ≤ 35℃, controlled humidity, protected from light, away from heat sources, open flames, and strong oxidants. Store separately and do not mix with acids or alkalis.
Container: Fully sealed. Use up the contents as soon as opened; any remaining materials after opening must be resealed to prevent moisture.
Shelf life: 24 months (original packaging is intact and storage is compliant)
Q: What is the minimum order quantity?
A: The regular MOQ is 25kg (standard one bucket); sample testing is also supported.
Q: What is the sample policy?
A: Samples are free of charge, and the shipping cost is borne by the buyer (prepaid); samples are sealed with aluminum foil and come with COA, TDS, and SDS. Samples are generally sent out within 1-2 working days.
Q: How long is the delivery cycle?
A: Regular purity is available in stock: 3-5 working days; custom specifications: 7-10 working days, as confirmed in the order confirmation sheet.
Q: Is the product prone to moisture? Can it still be used after getting wet?
A: The BPDA acid anhydride group is extremely prone to hydrolysis upon contact with water. After absorbing water, the anhydride value decreases, and the polymerization activity deteriorates, directly affecting the film performance. Severe moisture absorption is not recommended for use; after opening, try to use it all at once, and reseal the remaining materials.
Q: What are the storage conditions and shelf life?
A: In a cool, dry, and ventilated warehouse, with a temperature of ≤35℃, strictly moisture-proof, away from acids, alkalis, and strong oxidants; the original packaging is sealed intact and has a shelf life of 24 months.
Q: What documents can be provided?
A: Chinese and English SDS, TDS, COA factory test reports; relevant supporting materials can be provided upon request, for overseas registration of customers.
Q: Can it be consolidated in a container?
A: Yes, consolidation in a container is possible; avoid water solutions, acid-base materials, and keep them isolated to prevent moisture absorption.
