9,9'-Dixanthylidene

Also known as: 9,9'-Bixanthenylidene, Dixanthylene, 9-(9H-xanthen-9-ylidene)-9H-xanthene, Bixanthylidene, EINECS 208-241-5, MFCD00597968

9,9'-Dixanthylidene (CAS 517-45-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C26H16O2 and a molecular weight of 360.40400 g/mol. Key properties include a melting point of 318-320ºC, a boiling point of 494.2ºC at 760mmHg, a density of 1.3g/cm3 and a flash point of 188.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 517-45-3
Jingsj CID: J-47140-9
Molecular Formula: C₂₆H₁₆O₂
Molecular Weight: 360.40400 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	318-320ºC
Boiling Point	494.2ºC at 760mmHg
Density	1.3g/cm3
Flash Point	188.4ºC
Exact Mass	360.11500
PSA	18.46000
LogP	6.90540
Refractive Index	1.711

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 9,9'-Dixanthylidene?

The CAS number of 9,9'-Dixanthylidene is 517-45-3.

What are the molecular formula and molecular weight of 9,9'-Dixanthylidene?

9,9'-Dixanthylidene has molecular formula C26H16O2 and molecular weight 360.40400 g/mol.

What are the upstream and downstream products of 9,9'-Dixanthylidene?

For 9,9'-Dixanthylidene, Upstream Products: Xanthone, Benzophenone, Xanthene; Downstream Products: Xanthone.

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. "9,9'-Dixanthylidene (CAS 517-45-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47140-9 (accessed 2026-11-09).

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