(2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone

茚酮二聚体

Also known as: Donepezil Impurity 22, Donepezil impurity 25, Donepezil-024, (Z)-5,5',6,6'-tetramethoxy-2,3-dihydro-[1,2'-biindenylidene]-1'(3'H)-one, 1H-Inden-1-one, 2-(2,3-dihydro-5,6-dimethoxy-1H-inden-1-ylidene)-2,3-dihydro-5,6-dimethoxy-, 2-(2,3-Dihydro-5,6-dimethoxy-1H-inden-1-ylidene)-2,3-dihydro-5,6-dimethoxy-1H-inden-1-one, 5,5',6,6'-tetramethoxy-2,3-dihydro-[1,2'-biindenylidene]-1'(3'H)-one, (2E)-1H-Inden-1-one, 2-(2,3-dihydro-5,6-dimethoxy-1H-inden-1-ylidene)-2,3-dihydro-5,6-dimethoxy-

(2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone (CAS 36159-03-2) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C22H22O5 and a molecular weight of 366.407 g/mol. It is also known as Donepezil Impurity 22, Donepezil impurity 25 and Donepezil-024. Key properties include a boiling point of 561.5±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 246.2±30.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 36159-03-2
Jingsj CID: J-1365574-1
Molecular Formula: C₂₂H₂₂O₅
Chinese Name: 茚酮二聚体
Molecular Weight: 366.407 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	561.5±50.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	246.2±30.2 °C

Frequently Asked Questions

What is the CAS number of (2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone?

The CAS number of (2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone is 36159-03-2.

What are the molecular formula and molecular weight of (2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone?

(2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone has molecular formula C22H22O5 and molecular weight 366.407 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "(2E)-2-(5,6-Dimethoxy-2,3-dihydro-1H-inden-1-ylidene)-5,6-dimethoxy-1-indanone (CAS 36159-03-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1365574-1 (accessed 2026-10-26).

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