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5(6)-Carboxy-2',7'-dichlorofluorescein

5(6)-羧基-2',7'-二氯荧光素

Also known as: 5-(6)-CDCF, DCFA (5(6)-Carboxy-2',7'-dichlorofluorescein), 5(6)-CARBOXY-2' 7'-DICHLOROFLUORESCEIN, 2',7'-dichloro-3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-5(6)-carboxylic acid, 5(6)-Carboxy-2',7'-dichlorofluorescein (mixed isomers)

5(6)-Carboxy-2',7'-dichlorofluorescein (CAS 111843-78-8) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H10Cl2O7 and a molecular weight of 445.20600 g/mol. It is also known as 5-(6)-CDCF, DCFA (5(6)-Carboxy-2',7'-dichlorofluorescein) and 5(6)-CARBOXY-2' 7'-DICHLOROFLUORESCEIN. Key properties include a melting point of 250ºC, a boiling point of 732.3ºC at 760mmHg, a density of 1.86g/cm3 and a flash point of 396.7ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
111843-78-8
Jingsj CID
J-1987224-3
Molecular Formula
C21H10Cl2O7
Chinese Name
5(6)-羧基-2',7'-二氯荧光素
Molecular Weight
445.20600 g/mol
Category
Organohalogen Compounds
Last updated
8/21/2026

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Physicochemical Properties

Melting Point250ºC
Boiling Point732.3ºC at 760mmHg
Density1.86g/cm3
Flash Point396.7ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 5(6)-Carboxy-2',7'-dichlorofluorescein?

The CAS number of 5(6)-Carboxy-2',7'-dichlorofluorescein is 111843-78-8.

What are the molecular formula and molecular weight of 5(6)-Carboxy-2',7'-dichlorofluorescein?

5(6)-Carboxy-2',7'-dichlorofluorescein has molecular formula C21H10Cl2O7 and molecular weight 445.20600 g/mol.

Is 5(6)-Carboxy-2',7'-dichlorofluorescein hazardous?

5(6)-Carboxy-2',7'-dichlorofluorescein 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. "5(6)-Carboxy-2',7'-dichlorofluorescein (CAS 111843-78-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1987224-3 (accessed 2026-10-25).

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