9-Fluorenylideneacetic acid

9-亚芴基乙酸

Also known as: 2-(9H-Fluoren-9-ylidene)acetic acid, 9H-Fluoren-9-ylideneacetic acid, 9H-Fluorene-9-ylideneacetic acid, Biphenyleneacrylic acid, Biphenylenecrylic acid, Dibenzofulvene-1-carboxylic acid, Fluoren-9-ylideneacetic acid, Acetic acid, 9H-fluoren-9-ylidene-

9-Fluorenylideneacetic acid (CAS 4425-73-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C15H10O2 and a molecular weight of 222.23900 g/mol. It is also known as 2-(9H-Fluoren-9-ylidene)acetic acid, 9H-Fluoren-9-ylideneacetic acid and 9H-Fluorene-9-ylideneacetic acid. Key properties include a melting point of 231-233ºC, a boiling point of 385.7ºC at 760 mmHg, a density of 1.387g/cm3 and a flash point of 284.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4425-73-4
Jingsj CID: J-46166-3
Molecular Formula: C₁₅H₁₀O₂
Chinese Name: 9-亚芴基乙酸
Molecular Weight: 222.23900 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	231-233ºC
Boiling Point	385.7ºC at 760 mmHg
Density	1.387g/cm3
Flash Point	284.1ºC
Exact Mass	222.06800
PSA	37.30000
LogP	3.18330

Customs & Trade Information

HS Code	2916399090
Summary	2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 9-Fluorenylideneacetic acid?

The CAS number of 9-Fluorenylideneacetic acid is 4425-73-4.

What are the molecular formula and molecular weight of 9-Fluorenylideneacetic acid?

9-Fluorenylideneacetic acid has molecular formula C15H10O2 and molecular weight 222.23900 g/mol.

What are the upstream and downstream products of 9-Fluorenylideneacetic acid?

For 9-Fluorenylideneacetic acid, Upstream Products: Ethyl 2-(9H-fluoren-9-ylidene)acetate, 9-Ethynyl-9H-fluoren-9-ol, 9-Fluorenone; Downstream Products: 9-Fluoreneacetic acid, Methyl 9-fluorenylideneacetate.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "9-Fluorenylideneacetic acid (CAS 4425-73-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46166-3 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.