2,7-Dibromo-9,9'-spirobifluorene

Also known as: 2,7-Dibromo-9,9-spiro-bifluorene, 2,7-Dibromo-9,9'-spirobi[9H-fluorene], 2,7-Dibromo-9,9'-spirobifluorene, 2',7'-dibromo-9,9'-spirobifluorene, 9,9'-Spirobi[9H-fluorene], 2,7-dibromo-

2,7-Dibromo-9,9'-spirobifluorene (CAS 171408-84-7) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C25H14Br2 and a molecular weight of 474.187 g/mol. Key properties include a boiling point of 557.4±50.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 335.1±29.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 171408-84-7
Jingsj CID: J-1524002-5
Molecular Formula: C₂₅H₁₄Br₂
Molecular Weight: 474.187 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	557.4±50.0 °C at 760 mmHg
Density	1.7±0.1 g/cm3
Flash Point	335.1±29.4 °C
Exact Mass	471.946198
LogP	8.04
Vapor Pressure	0.0±1.5 mmHg at 25°C
Refractive Index	1.804

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 2,7-Dibromo-9,9'-spirobifluorene?

The CAS number of 2,7-Dibromo-9,9'-spirobifluorene is 171408-84-7.

What are the molecular formula and molecular weight of 2,7-Dibromo-9,9'-spirobifluorene?

2,7-Dibromo-9,9'-spirobifluorene has molecular formula C25H14Br2 and molecular weight 474.187 g/mol.

What are the upstream and downstream products of 2,7-Dibromo-9,9'-spirobifluorene?

For 2,7-Dibromo-9,9'-spirobifluorene, Upstream Products: 2,7-Dibromo-9-fluorenone, 2-Bromobiphenyl, 9H-Fluoren-1-ol; Downstream Products: 2,2',7,7'-Tetrabromo-9,9'-spirobifluorene.

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. "2,7-Dibromo-9,9'-spirobifluorene (CAS 171408-84-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1524002-5 (accessed 2026-11-09).

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