1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one

Also known as: 2H-1-Benzazepin-2-one, 1,3,4,5-tetrahydro-1-methyl-, 1-methyl-1,3,4,5-tetrahydro-2H-1-benzazepin-2-one, 1-methyl-4,5-dihydro-3H-1-benzazepin-2-one, 1-methyl-4,5-dihydro-1H-benzo[b]azepin-2(3H)-one, 1-methyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-2-one

1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one (CAS 20678-82-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H13NO and a molecular weight of 175.22700 g/mol. Key properties include a boiling point of 371.1ºC at 760 mmHg, a density of 1.084g/cm3 and a flash point of 181.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 20678-82-4
Jingsj CID: J-1603222-7
Molecular Formula: C₁₁H₁₃NO
Molecular Weight: 175.22700 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	371.1ºC at 760 mmHg
Density	1.084g/cm3
Flash Point	181.1ºC
Exact Mass	175.10000
PSA	20.31000
LogP	2.05070
Vapor Pressure	1.05E-05mmHg at 25°C
Refractive Index	1.549
Storage Conditions	2-8℃

Frequently Asked Questions

What is the CAS number of 1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one?

The CAS number of 1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one is 20678-82-4.

What are the molecular formula and molecular weight of 1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one?

1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one has molecular formula C11H13NO and molecular weight 175.22700 g/mol.

What are the upstream and downstream products of 1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one?

For 1-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one, Upstream Products: 4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one, iodomethane.

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-methyl-2,3,4,5-tetrahydro-1H-1-benzazepin-2-one (CAS 20678-82-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1603222-7 (accessed 2026-11-09).

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