5-Methyl-3(2H)-benzofuranone

Also known as: 5-Methylbenzofuran-3(2H)-one, 5-Methyl-2,3-dihydro-1-benzofuran-3-one, 5-Methyl-3-oxo-2,3-dihydrobenzofuran, 5-Methyl-1-benzofuran-3(2H)-one, 5-METHYLBENZOFURAN-3-ONE

5-Methyl-3(2H)-benzofuranone (CAS 54120-66-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H8O2 and a molecular weight of 148.15900 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 54120-66-0
Jingsj CID: J-1026622-5
Molecular Formula: C₉H₈O₂
Molecular Weight: 148.15900 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Exact Mass	148.05200
PSA	26.30000
LogP	1.57010

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 5-Methyl-3(2H)-benzofuranone?

The CAS number of 5-Methyl-3(2H)-benzofuranone is 54120-66-0.

What are the molecular formula and molecular weight of 5-Methyl-3(2H)-benzofuranone?

5-Methyl-3(2H)-benzofuranone has molecular formula C9H8O2 and molecular weight 148.15900 g/mol.

What are the upstream and downstream products of 5-Methyl-3(2H)-benzofuranone?

For 5-Methyl-3(2H)-benzofuranone, Upstream Products: 2-Bromo-2'-hydroxy-5'-methylacetophenone, 2'-Hydroxy-5'-methylacetophenone, (4-Methylphenoxy)acetyl chloride.

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-Methyl-3(2H)-benzofuranone (CAS 54120-66-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1026622-5 (accessed 2026-11-09).

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