Fluorescein-O'-acetic acid

荧光素-O'-乙酸

Also known as: FOAA, 2-[3-(carboxymethoxy)-6-oxoxanthen-9-yl]benzoic acid, Acetic acid,2-[(6'-hydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3'-yl)oxy]-, O'-(Carboxymethyl)fluorescein, Oμ-(Carboxymethyl)fluorescein

Fluorescein-O'-acetic acid (CAS 233759-98-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C22H14O7 and a molecular weight of 390.34200 g/mol. It is also known as FOAA, 2-[3-(carboxymethoxy)-6-oxoxanthen-9-yl]benzoic acid and Acetic acid,2-[(6'-hydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3'-yl)oxy]-. Key properties include a boiling point of 718.2ºC at 760 mmHg, a density of 1.55g/cm3 and a flash point of 259.6ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
233759-98-3
Jingsj CID
J-1958475-9
Molecular Formula
C22H14O7
Chinese Name
荧光素-O'-乙酸
Molecular Weight
390.34200 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point718.2ºC at 760 mmHg
Density1.55g/cm3
Flash Point259.6ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of Fluorescein-O'-acetic acid?

The CAS number of Fluorescein-O'-acetic acid is 233759-98-3.

What are the molecular formula and molecular weight of Fluorescein-O'-acetic acid?

Fluorescein-O'-acetic acid has molecular formula C22H14O7 and molecular weight 390.34200 g/mol.

Is Fluorescein-O'-acetic acid hazardous?

Fluorescein-O'-acetic acid has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "Fluorescein-O'-acetic acid (CAS 233759-98-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1958475-9 (accessed 2026-10-25).

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