3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

3-甲基-1,3-二氢-2H-咪唑并[4,5-b]吡啶-2-酮

Also known as: 3-Methyl-1H-imidazo[4,5-b]pyridin-2(3H)-one, 3-Methyl-2,3-dihydro-2-oxo-imidazo[4,5-b]pyridine, 2H-Imidazo[4,5-b]pyridin-2-one, 1,3-dihydro-3-methyl-, 3-Methyl-1H-imidazo[4,5-b]pyridin-2-one

3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (CAS 21991-39-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H7N3O and a molecular weight of 149.15000 g/mol. It is also known as 3-Methyl-1H-imidazo[4,5-b]pyridin-2(3H)-one, 3-Methyl-2,3-dihydro-2-oxo-imidazo[4,5-b]pyridine and 2H-Imidazo[4,5-b]pyridin-2-one, 1,3-dihydro-3-methyl-. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21991-39-9
Jingsj CID: J-1573233-4
Molecular Formula: C₇H₇N₃O
Chinese Name: 3-甲基-1,3-二氢-2H-咪唑并[4,5-b]吡啶-2-酮
Molecular Weight: 149.15000 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of 3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one?

The CAS number of 3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one is 21991-39-9.

What are the molecular formula and molecular weight of 3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one?

3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one has molecular formula C7H7N3O and molecular weight 149.15000 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "3-Methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (CAS 21991-39-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1573233-4 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.