4,5-Difluorophthalic anhydride
Also known as: 5,6-Difluoroisobenzofuran-1,3-dione, 5,6-Difluoro-2-benzofuran-1,3-dione, 5,6-difluoro-1,3-Isobenzofurandione, 1,3-Isobenzofurandione, 5,6-difluoro-, 5,6-difluoro-1,3-dihydro-2-benzofuran-1,3-dione, 4,5-Difluorophthalic acid anhydride
4,5-Difluorophthalic anhydride (CAS 18959-30-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H2F2O3 and a molecular weight of 184.096 g/mol. Key properties include a melting point of 99-100℃, a boiling point of 321.2±32.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 143.3±20.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 18959-30-3
- Jingsj CID
- J-1494946-3
- Molecular Formula
- C8H2F2O3
- Molecular Weight
- 184.096 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 99-100℃ |
|---|---|
| Boiling Point | 321.2±32.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 143.3±20.0 °C |
| Exact Mass | 183.997192 |
| PSA | 43.37000 |
| LogP | 1.61 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.556 |
| Storage Conditions | 2-8°C |
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 4,5-Difluorophthalic anhydride?
The CAS number of 4,5-Difluorophthalic anhydride is 18959-30-3.
What are the molecular formula and molecular weight of 4,5-Difluorophthalic anhydride?
4,5-Difluorophthalic anhydride has molecular formula C8H2F2O3 and molecular weight 184.096 g/mol.
What are the upstream and downstream products of 4,5-Difluorophthalic anhydride?
For 4,5-Difluorophthalic anhydride, Upstream Products: 4,5-dichlorophthalic anhydride; Downstream Products: 3,4-Difluorobenzoic acid, Methyl 2-bromo-4,5-difluorobenzoate, 2-Amino-4,5-difluorobenzoic 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. "4,5-Difluorophthalic anhydride (CAS 18959-30-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1494946-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.