1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one

Also known as: Ramelteon intermediate, Ramelteon nucleus, 6,7-dihydro-1H-indeno[5,4-b]furan-8(2H)-one, Ramelteon impurity A, Ramelteon impurity 9, Ramelteon I, 1,2,6,7-tetrahydrocyclopenta[e][1]benzofuran-8-one, tetrahydroindenobfuranone, 8H-Indeno[5,4-b]furan-8-one, 1,2,6,7-tetrahydro-, 1,2,6,7-tetrahydroindeno[5,4-b]furan-8-one

1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one (CAS 196597-78-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H10O2 and a molecular weight of 174.196 g/mol. Key properties include a melting point of 149-151ºC, a boiling point of 334.2±42.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 165.6±21.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 196597-78-1
Jingsj CID: J-1509904-4
Molecular Formula: C₁₁H₁₀O₂
Molecular Weight: 174.196 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	149-151ºC
Boiling Point	334.2±42.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	165.6±21.4 °C
Exact Mass	174.068085
PSA	26.30000
LogP	2.28
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.624
Storage Conditions	2~8 ℃

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one?

The CAS number of 1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one is 196597-78-1.

What are the molecular formula and molecular weight of 1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one?

1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one has molecular formula C11H10O2 and molecular weight 174.196 g/mol.

What are the upstream and downstream products of 1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one?

For 1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one, Upstream Products: 4,5-dibromo-1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-one, Formaldehyde, 2,3-Dihydrobenzofuran; Downstream Products: 2,6,7,8-Tetrahydro-1H-indeno[5,4-b]furan-8-ylethylamine, (1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-ylidene)acetonitrile, (E)-(1,6,7,8-Tetrahydro-2H-indeno[5,4-b]furan-8-ylidene)acetonitrile.

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. "1,2,6,7-Tetrahydro-8H-indeno[5,4-b]furan-8-one (CAS 196597-78-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1509904-4 (accessed 2026-11-09).

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