3,3',5,5'-Tetramethyldiphenoquinone

Also known as: 3,3',5,5'-Tetramethyldiphenoquinone, 4-(3,5-Dimethyl-4-oxo-2,5-cyclohexadien-1-ylidene)-2,6-dimethyl-2,5-cyclohexadien-1-one, TMDQ, 2,2',6,6'-Tetramethyl-Δ4,4'-bi[2,5-cyclohexadiene]-1,1'-dione, 3,3',5,5'-Tetramethyl-4,4'-diphenoquinone, Tetramethyldiphenoquinone, tetramethyl-4,4'-biphenylquinone, Δ4,4'-Bi(2,6-dimethyl-2,5-cyclohexadiene-1-one), 3,3',5,5'-tetramethyl-1,1'-bi(cyclohexa-2,5-dien-1-ylidene)-4,4'-dione

3,3',5,5'-Tetramethyldiphenoquinone (CAS 4906-22-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C16H16O2 and a molecular weight of 240.29700 g/mol. Key properties include a melting point of 205-207ºC, a boiling point of 375.1ºC at 760 mmHg, a density of 1.123g/cm3 and a flash point of 140.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4906-22-3
Jingsj CID: J-1139357-0
Molecular Formula: C₁₆H₁₆O₂
Molecular Weight: 240.29700 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	205-207ºC
Boiling Point	375.1ºC at 760 mmHg
Density	1.123g/cm3
Flash Point	140.7ºC
Exact Mass	240.11500
PSA	34.14000
LogP	3.23360
Refractive Index	1.572

Customs & Trade Information

HS Code	2914299000
Summary	2914299000. other cyclanic, cyclenic or cyclotherpenic 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 3,3',5,5'-Tetramethyldiphenoquinone?

The CAS number of 3,3',5,5'-Tetramethyldiphenoquinone is 4906-22-3.

What are the molecular formula and molecular weight of 3,3',5,5'-Tetramethyldiphenoquinone?

3,3',5,5'-Tetramethyldiphenoquinone has molecular formula C16H16O2 and molecular weight 240.29700 g/mol.

What are the upstream and downstream products of 3,3',5,5'-Tetramethyldiphenoquinone?

For 3,3',5,5'-Tetramethyldiphenoquinone, Upstream Products: 3,3',5,5'-Tetramethyl-[1,1'-biphenyl]-4,4'-diol, 2,6-Dimethylphenol, 2,6-Di-tert-butylphenol; Downstream Products: 2,6-dimethyl-p-benzoquinone, 3,3',5,5'-Tetramethyl-[1,1'-biphenyl]-4,4'-diol.

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. "3,3',5,5'-Tetramethyldiphenoquinone (CAS 4906-22-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1139357-0 (accessed 2026-11-09).

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