3H-naphtho[2,1-b]pyran-3-one

Also known as: benzo[f]chromen-3-one, 5,6-benzocoumarin, 3H-benzo[f]chromen-3-one, naphthopyran-2-one, naphthopiranone

3H-naphtho[2,1-b]pyran-3-one (CAS 4352-89-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C13H8O2 and a molecular weight of 196.20100 g/mol. Key properties include a melting point of 117－119ºC, a boiling point of 402.6ºC at 760 mmHg, a density of 1.297 and a flash point of 169.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4352-89-0
Jingsj CID: J-1027332-2
Molecular Formula: C₁₃H₈O₂
Molecular Weight: 196.20100 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	117－119ºC
Boiling Point	402.6ºC at 760 mmHg
Density	1.297
Flash Point	169.7ºC
Exact Mass	196.05200
PSA	30.21000
LogP	2.94620
Refractive Index	1.687

Customs & Trade Information

HS Code	2914399090
Summary	2914399090. other aromatic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3H-naphtho[2,1-b]pyran-3-one?

The CAS number of 3H-naphtho[2,1-b]pyran-3-one is 4352-89-0.

What are the molecular formula and molecular weight of 3H-naphtho[2,1-b]pyran-3-one?

3H-naphtho[2,1-b]pyran-3-one has molecular formula C13H8O2 and molecular weight 196.20100 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. "3H-naphtho[2,1-b]pyran-3-one (CAS 4352-89-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1027332-2 (accessed 2026-11-09).

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