4,4'-Difluorobiphenyl

Also known as: 1,1'-Biphenyl, 4,4'-difluoro-, 1-fluoro-4-(4-fluorophenyl)benzene, 4,4-Difluorobiphenyl, EINECS 206-910-6, MFCD00000349

4,4'-Difluorobiphenyl (CAS 398-23-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H8F2 and a molecular weight of 190.189 g/mol. Key properties include a melting point of 88-91 °C(lit.), a boiling point of 254.7±15.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 88.8±8.3 °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.: 398-23-2
Jingsj CID: J-49832-8
Molecular Formula: C₁₂H₈F₂
Molecular Weight: 190.189 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	88-91 °C(lit.)
Boiling Point	254.7±15.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	88.8±8.3 °C
Exact Mass	190.059402
LogP	3.84
Vapor Pressure	0.0±0.5 mmHg at 25°C
Refractive Index	1.536

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 4,4'-Difluorobiphenyl?

The CAS number of 4,4'-Difluorobiphenyl is 398-23-2.

What are the molecular formula and molecular weight of 4,4'-Difluorobiphenyl?

4,4'-Difluorobiphenyl has molecular formula C12H8F2 and molecular weight 190.189 g/mol.

Is 4,4'-Difluorobiphenyl hazardous?

4,4'-Difluorobiphenyl 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'-Difluorobiphenyl?

For 4,4'-Difluorobiphenyl, Upstream Products: 4-Fluorobenzeneboronic acid, 4-Fluorophenylmagnesium bromide, 4-Fluoroiodobenzene; Downstream Products: 4-Fluorobenzoic acid, 4,4'-difluoro-[1,1'-biphenyl]-3-carboxylic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "4,4'-Difluorobiphenyl (CAS 398-23-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49832-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.