5,6-Dimethoxy-3,3-dimethyl-1-indanone

Also known as: 2,3-dihydro-5,6-dimethoxy-3,3-dimethyl-1H-inden-1-one, 5,6-Dimethoxy-3,3-dimethyl-2,3-dihydro-1H-inden-1-one, NISTC4136269

5,6-Dimethoxy-3,3-dimethyl-1-indanone (CAS 4136-26-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C13H16O3 and a molecular weight of 220.264 g/mol. Key properties include a melting point of 69-70°C, a boiling point of 351.2±42.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 157.4±14.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4136-26-9
Jingsj CID: J-1188640-1
Molecular Formula: C₁₃H₁₆O₃
Molecular Weight: 220.264 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	69-70°C
Boiling Point	351.2±42.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	157.4±14.3 °C
Exact Mass	220.109940
PSA	35.53000
LogP	3.29
Vapor Pressure	0.0±0.8 mmHg at 25°C
Refractive Index	1.520

Customs & Trade Information

HS Code	2914509090
Summary	HS:2914509090 other ketones with other oxygen function VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 5,6-Dimethoxy-3,3-dimethyl-1-indanone?

The CAS number of 5,6-Dimethoxy-3,3-dimethyl-1-indanone is 4136-26-9.

What are the molecular formula and molecular weight of 5,6-Dimethoxy-3,3-dimethyl-1-indanone?

5,6-Dimethoxy-3,3-dimethyl-1-indanone has molecular formula C13H16O3 and molecular weight 220.264 g/mol.

What are the upstream and downstream products of 5,6-Dimethoxy-3,3-dimethyl-1-indanone?

For 5,6-Dimethoxy-3,3-dimethyl-1-indanone, Upstream Products: 1,2-Dimethoxybenzene, 3-Methyl-2-butenoic acid, iodomethane.

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

Last updated: 8/21/2026

How to cite: Jingsj. "5,6-Dimethoxy-3,3-dimethyl-1-indanone (CAS 4136-26-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1188640-1 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.