4-Bromo-4'-fluorobiphenyl

Also known as: 1-(4-bromophenyl)-4-fluorobenzene, 1-bromo-4-(4-fluorophenyl)benzene, 4'-fluoro-4-bromobiphenyl, 4-bromo-4'-fluoro-1,1'-biphenyl, 4-fluoro-4'-bromobiphenyl, 4'-bromo-4-fluorobiphenyl, AKOS BAR-2324, Biphenyl, 4-bromo-4'-fluoro-, Bromofluorobiphenyl2, NSC 91565

4-Bromo-4'-fluorobiphenyl (CAS 398-21-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H8BrF and a molecular weight of 251.09400 g/mol. Key properties include a melting point of 92.5-97.5 °C(lit.), a boiling point of 307.6ºC at 760 mmHg, a density of 1.433 g/cm3 and a flash point of 143.7ºC. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H318 — Causes serious eye damage and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 398-21-0
Jingsj CID: J-32503-1
Molecular Formula: C₁₂H₈BrF
Molecular Weight: 251.09400 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	92.5-97.5 °C(lit.)
Boiling Point	307.6ºC at 760 mmHg
Density	1.433 g/cm3
Flash Point	143.7ºC
Exact Mass	249.97900
LogP	4.25520
Refractive Index	1.535

GHS Safety & Compliance

Corrosion / Irritant / Environmental HazardSignal word: Danger

H302 — Harmful if swallowed
H318 — Causes serious eye damage
H410 — Very toxic to aquatic life with long lasting effects

Customs & Trade Information

HS Code	2903999090
Summary	2903999090 halogenated derivatives of aromatic hydrocarbons VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4-Bromo-4'-fluorobiphenyl?

The CAS number of 4-Bromo-4'-fluorobiphenyl is 398-21-0.

What are the molecular formula and molecular weight of 4-Bromo-4'-fluorobiphenyl?

4-Bromo-4'-fluorobiphenyl has molecular formula C12H8BrF and molecular weight 251.09400 g/mol.

Is 4-Bromo-4'-fluorobiphenyl hazardous?

4-Bromo-4'-fluorobiphenyl has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H318 — Causes serious eye damage; H410 — Very toxic to aquatic life with long lasting effects.

What are the upstream and downstream products of 4-Bromo-4'-fluorobiphenyl?

For 4-Bromo-4'-fluorobiphenyl, Upstream Products: 4-Fluoroiodobenzene, 4-Bromophenylboronic acid, 4,4'-Dibromobiphenyl; Downstream Products: 4'-Fluoro[1,1'-biphenyl]-4-carbaldehyde.

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-Bromo-4'-fluorobiphenyl (CAS 398-21-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32503-1 (accessed 2026-11-09).

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