4,4'-Oxydiphthalic anhydride
Also known as: 4,4'-Oxydiphthalic dianhydride, ODPA, 5,5'-Oxybis-1,3-isobenzofurandione, 5,5'-Oxybis(2-benzofuran-1,3-dione), Bis-(3-phthalyl anhydride) ether, 3,3',4,4'-diphenylether-tetracarboxylic acid dianhydride, dianhydride of 3,4,3',4'-tetracarboxydiphenyl oxide, s-ODPA
4,4'-Oxydiphthalic anhydride (CAS 1823-59-2) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C16H6O7 and a molecular weight of 310.215 g/mol. Key properties include a melting point of 225-229 °C(lit.), a boiling point of 577.7±35.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 260.7±26.0 °C. GHS hazard statements: H412 — Harmful to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1823-59-2
- Jingsj CID
- J-44406-8
- Molecular Formula
- C16H6O7
- Molecular Weight
- 310.215 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 225-229 °C(lit.) |
|---|---|
| Boiling Point | 577.7±35.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 260.7±26.0 °C |
| Exact Mass | 310.011353 |
| PSA | 95.97000 |
| LogP | 2.97 |
| Vapor Pressure | 0.0±1.6 mmHg at 25°C |
| Refractive Index | 1.694 |
GHS Safety & Compliance
- H412 — Harmful to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 4,4'-Oxydiphthalic anhydride?
The CAS number of 4,4'-Oxydiphthalic anhydride is 1823-59-2.
What are the molecular formula and molecular weight of 4,4'-Oxydiphthalic anhydride?
4,4'-Oxydiphthalic anhydride has molecular formula C16H6O7 and molecular weight 310.215 g/mol.
Is 4,4'-Oxydiphthalic anhydride hazardous?
4,4'-Oxydiphthalic anhydride has GHS hazard statements H412 — Harmful to aquatic life with long lasting effects.
What are the upstream and downstream products of 4,4'-Oxydiphthalic anhydride?
For 4,4'-Oxydiphthalic anhydride, Upstream Products: 4-Chlorophthalic anhydride, Potassium carbonate, Triphenyl phosphite; Downstream Products: 4-Chlorophthalic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,4'-Oxydiphthalic anhydride (CAS 1823-59-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44406-8 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.