4,4'-Diphenylbenzophenone

Also known as: Bis(4-biphenylyl)methanone, Bis(4-phenylphenyl)methanone, Di-4-biphenylyl ketone, Bis(biphenyl-4-yl)methanone, 4,4'-Diphenylbenzophenone, NSC 21390

4,4'-Diphenylbenzophenone (CAS 3478-90-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C25H18O and a molecular weight of 334.41000 g/mol. Key properties include a melting point of 228-229ºC, a boiling point of 523.7ºC at 760 mmHg, a density of 1.121 g/cm3 and a flash point of 229.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3478-90-8
Jingsj CID: J-1510596-1
Molecular Formula: C₂₅H₁₈O
Molecular Weight: 334.41000 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	228-229ºC
Boiling Point	523.7ºC at 760 mmHg
Density	1.121 g/cm3
Flash Point	229.7ºC
Exact Mass	334.13600
PSA	17.07000
LogP	6.25160
Refractive Index	1.623

Customs & Trade Information

HS Code	2914399090
Summary	2914399090. other aromatic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

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

The CAS number of 4,4'-Diphenylbenzophenone is 3478-90-8.

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

4,4'-Diphenylbenzophenone has molecular formula C25H18O and molecular weight 334.41000 g/mol.

What are the upstream and downstream products of 4,4'-Diphenylbenzophenone?

For 4,4'-Diphenylbenzophenone, Upstream Products: 4,4'-Dibromobenzophenone, Phenylboronic acid, Oxalyl chloride.

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'-Diphenylbenzophenone (CAS 3478-90-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1510596-1 (accessed 2026-11-09).

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