Molekula
4,4'-Oxydiphthalic anhydride (NS)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
4,4'-Oxydiphthalic anhydride (ODPA) is a high-performance anhydride used primarily in the synthesis of polyimides, epoxy resins, and specialty polymers for aerospace, electronics, and high-temperature applications. It enhances thermal stability, mechanical strength, and chemical resistance in end products. CAS 1823-59-2, molecular formula C16H6O7, molecular weight 310.21. Store at ambient conditions. Signal word: Danger (EU classification). Molekula supplies 4,4'-Oxydiphthalic anhydride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
Specifications available on request — see Documents below or contact our sales team.
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90028087 |
| CAS Number | 1823-59-2 |
| IUPAC Name | 5-[(1,3-dioxo-2-benzofuran-5-yl)oxy]-2-benzofuran-1,3-dione |
| EC Number | 412-830-4 |
| Molecular Formula | C16H6O7 |
| Molecular Weight | 310.21 |
| Exact Mass | 310.0114 |
| SMILES | C1=CC2=C(C=C1OC3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O |
| InChIKey | QQGYZOYWNCKGEK-UHFFFAOYSA-N |
| InChI | InChI=1S/C16H6O7/c17-13-9-3-1-7(5-11(9)15(19)22-13)21-8-2-4-10-12(6-8)16(20)23-14(10)18/h1-6H |
| PubChem CID | 74574 |
| REACH Code | Y110 |
| HTS Code | 29189947 |
| Tariff Code | 2918999090 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,3-Isobenzofurandione, 5,5'-oxybis-
- 3,3',4,4'-diphenyl ether tetracarboxylic anhydride
- 3,3',4,4'-DIPHENYL OXIDE TETRACARBOXYLIC DIANHYDRIDE
- 3,3',4,4'-DIPHENYLOXYTETRACARBOXYLIC DIANHYDRIDE
- 4,4'-oxybis(phthalic anhydride)
- 4,4'-oxydiphthalic acid dianhydride
- 4,4'-Oxydiphthalic anhydride
- 4,4'-Oxydiphthalic dianhydride
- 5,5'-Oxybis(2-benzofuran-1,3-dione)
- BIS(3,4-DICARBOXYPHENYL)ETHER DIANHYDRIDE
Frequently asked questions
What is 4,4'-Oxydiphthalic anhydride (NS) used for?
This chemical is primarily used as a curing agent for epoxy resins, particularly in high-performance composites, adhesives, and coatings requiring thermal stability.
What is the chemical formula and molecular weight of 4,4'-Oxydiphthalic anhydride?
The formula is **C₁₆H₆O₇**, and the molecular weight is **310.21 g/mol**.
How should 4,4'-Oxydiphthalic anhydride be stored?
Store in a cool, dry, well-ventilated area at **ambient temperature**, away from moisture and incompatible materials, in tightly sealed containers.
What grade or purity is available for this product?
Molekula supplies **technical/industrial grade** (typically ≥98% purity) for applications requiring high-performance chemical properties.
Can Molekula supply 4,4'-Oxydiphthalic anhydride in bulk quantities?
Yes, we offer **bulk packaging options** (e.g., 25 kg drums, 1 MT big bags) for large-scale industrial applications—please inquire for specific quantities.
What documentation is provided with an order of 4,4'-Oxydiphthalic anhydride?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a **Danger label** (Signal Word: *Danger*).
Ready to order or need a custom pack?
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