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4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one

4',5'-二氯荧光素

Also known as: 4',5'-Dichlorofluorescein, 4,5-Dichlorofluorescein, Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dichloro-3',6'-dihydroxy-, 2-(4,5-dichloro-6-hydroxy-3-oxo-3H-xanthen-9-yl)benzoic acid

4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one (CAS 2320-96-9) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C20H10Cl2O5 and a molecular weight of 401.196 g/mol. It is also known as 4',5'-Dichlorofluorescein, 4,5-Dichlorofluorescein and Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dichloro-3',6'-dihydroxy-. Key properties include a boiling point of 633.9±55.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 337.2±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
2320-96-9
Jingsj CID
J-1355944-1
Molecular Formula
C20H10Cl2O5
Chinese Name
4',5'-二氯荧光素
Molecular Weight
401.196 g/mol
Category
Organohalogen Compounds
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point633.9±55.0 °C at 760 mmHg
Density1.8±0.1 g/cm3
Flash Point337.2±31.5 °C

Frequently Asked Questions

What is the CAS number of 4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one?

The CAS number of 4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one is 2320-96-9.

What are the molecular formula and molecular weight of 4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one?

4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one has molecular formula C20H10Cl2O5 and molecular weight 401.196 g/mol.

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

Last updated:

How to cite: Jingsj. "4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one (CAS 2320-96-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1355944-1 (accessed 2026-10-25).

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