3,6-Difluorophthalic acid
Also known as: 1,2-Benzenedicarboxylic acid, 3,6-difluoro-, 3,6-difluorobenzene-1,2-dicarboxylic acid, MFCD03840499
3,6-Difluorophthalic acid (CAS 651-97-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H4F2O4 and a molecular weight of 202.112 g/mol. Key properties include a melting point of 184°C, a boiling point of 357.0±42.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 169.7±27.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 651-97-8
- Jingsj CID
- J-36989-1
- Molecular Formula
- C8H4F2O4
- Molecular Weight
- 202.112 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 184°C |
|---|---|
| Boiling Point | 357.0±42.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 169.7±27.9 °C |
| Exact Mass | 202.007767 |
| PSA | 74.60000 |
| LogP | 1.23 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.566 |
Customs & Trade Information
| HS Code | 2917399090 |
|---|---|
| Summary | 2917399090 aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3,6-Difluorophthalic acid?
The CAS number of 3,6-Difluorophthalic acid is 651-97-8.
What are the molecular formula and molecular weight of 3,6-Difluorophthalic acid?
3,6-Difluorophthalic acid has molecular formula C8H4F2O4 and molecular weight 202.112 g/mol.
What are the upstream and downstream products of 3,6-Difluorophthalic acid?
For 3,6-Difluorophthalic acid, Upstream Products: N,N-Diethyl-3,6-difluorophthalamic acid, 2,5-Difluorobenzoyl chloride; Downstream Products: 3,6-Difluorophthalic anhydride.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,6-Difluorophthalic acid (CAS 651-97-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-36989-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.