4,4'-Difluorobenzil
Also known as: 1,2-Bis(4-fluorophenyl)-1,2-ethanedione, 1,2-bis(4-fluorophenyl)ethane-1,2-dione, Bis(p-fluorophenyl)ethanedione, 4,4'-Difluorobibenzoyl, 4,4'-Fluorobenzil
4,4'-Difluorobenzil (CAS 579-39-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C14H8F2O2 and a molecular weight of 246.209 g/mol. Key properties include a melting point of 120-122 °C(lit.), a boiling point of 370.2±27.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 141.5±17.9 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 579-39-5
- Jingsj CID
- J-1422951-7
- Molecular Formula
- C14H8F2O2
- Molecular Weight
- 246.209 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 120-122 °C(lit.) |
|---|---|
| Boiling Point | 370.2±27.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 141.5±17.9 °C |
| Exact Mass | 246.049240 |
| PSA | 34.14000 |
| LogP | 3.82 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.562 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2914700090 |
|---|---|
| Summary | HS: 2914700090 halogenated, sulphonated, nitrated or nitrosated derivatives of ketones and quinones, whether or not with other oxygen function Tax rebate rate:9.0% Supervision conditions:none VAT:17.0% MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4,4'-Difluorobenzil?
The CAS number of 4,4'-Difluorobenzil is 579-39-5.
What are the molecular formula and molecular weight of 4,4'-Difluorobenzil?
4,4'-Difluorobenzil has molecular formula C14H8F2O2 and molecular weight 246.209 g/mol.
Is 4,4'-Difluorobenzil hazardous?
4,4'-Difluorobenzil has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 4,4'-Difluorobenzil?
For 4,4'-Difluorobenzil, Upstream Products: 4-Fluorobenzaldehyde, Tetraphenylphosphonium bromide, 4,4'-Dichlorobenzil; Downstream Products: N-(4-Fluorobenzoyl)piperidine, 1,2-Bis(4-fluorophenyl)ethanone, 1,2-Bis(4-fluorophenyl)-1,1,2,2-tetrafluoroethane.
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'-Difluorobenzil (CAS 579-39-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1422951-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.