Furo[3,4-b]pyridin-5(7H)-one

Also known as: 4-azaphthalide, 7h-furo[3,4-b]pyridin-5-one, 5,7-dihydrofuro[3,4-b]pyridin-5-one, furo[3,4-b]pyridin-5(7H)-one

Furo[3,4-b]pyridin-5(7H)-one (CAS 5657-51-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C7H5NO2 and a molecular weight of 135.120 g/mol. Key properties include a boiling point of 330.9±37.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 153.9±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5657-51-2
Jingsj CID: J-1333728-5
Molecular Formula: C₇H₅NO₂
Molecular Weight: 135.120 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	330.9±37.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	153.9±26.5 °C
Exact Mass	135.032028
PSA	39.19000
LogP	-0.32
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.593

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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 Furo[3,4-b]pyridin-5(7H)-one?

The CAS number of Furo[3,4-b]pyridin-5(7H)-one is 5657-51-2.

What are the molecular formula and molecular weight of Furo[3,4-b]pyridin-5(7H)-one?

Furo[3,4-b]pyridin-5(7H)-one has molecular formula C7H5NO2 and molecular weight 135.120 g/mol.

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. "Furo[3,4-b]pyridin-5(7H)-one (CAS 5657-51-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1333728-5 (accessed 2026-11-09).

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