4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one

Also known as: 1,3,4,5-Tetrahydro-2H-1-benzazepin-2-one, 4,5-Dihydro-1-benzoazepin-2(3H)-one, 2-Oxo-1,2,4,5-tetrahydro-3(3H)-benzazepine, 1,3,4,5-Tetrahydro-1-benzazepin-2-one, TetrahydroBenzazepin-2-One, MFCD00024149

4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one (CAS 4424-80-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H11NO and a molecular weight of 161.200 g/mol. Key properties include a melting point of 143 °C, a boiling point of 339.0±21.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 198.0±7.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4424-80-0
Jingsj CID: J-48212-2
Molecular Formula: C₁₀H₁₁NO
Molecular Weight: 161.200 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	143 °C
Boiling Point	339.0±21.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	198.0±7.0 °C
Exact Mass	161.084061
PSA	29.10000
LogP	1.84
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.548

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen 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 4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one?

The CAS number of 4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one is 4424-80-0.

What are the molecular formula and molecular weight of 4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one?

4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one has molecular formula C10H11NO and molecular weight 161.200 g/mol.

What are the upstream and downstream products of 4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one?

For 4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one, Upstream Products: 1-Tetralone, 3,4-Dihydronaphthalen-1(2H)-one oxime, 2,3,4,5-Tetrahydro-1H-benzo[b]azepine; Downstream Products: 3-iodo-1,3,4,5-tetrahydro-2H-1-benzazepin-2-one, (R)(2-OXO-2,3,4,5-TETRAHYDRO-1H-BENZO[B]AZEPIN-3-YL)-CARBAMIC ACID TERT-BUTYL ESTER, 7-Amino-1,3,4,5-tetrahydro-2H-1-benzazepin-2-one.

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. "4,5-Dihydro-1H-benzo[b]azepin-2(3H)-one (CAS 4424-80-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48212-2 (accessed 2026-11-09).

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