1,2,3,4-Tetrahydrobenzo[b]azepin-5-one

Also known as: 1,2,3,4-Tetrahydro-5H-1-benzazepin-5-one, 1,2,3,4-Tetrahydro-1-benzazepin-5-one, 1,2,3,4-Tetrahydro-5H-benzo[b]azepin-5-one, 1,2,3,4-Tetrahydrobenzoazepine-5-one, 5-oxo-2,3,4,5-tetrahydro-1H-benzazepine, 1,2,3,4-tetrahydrobenzo[b]azepin-5-tone, 5H-1-Benzazepin-5-one, 1,2,3,4-tetrahydro-

1,2,3,4-Tetrahydrobenzo[b]azepin-5-one (CAS 1127-74-8) 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 87-88°C, a boiling point of 314.6±12.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 142.8±19.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1127-74-8
Jingsj CID: J-30415-4
Molecular Formula: C₁₀H₁₁NO
Molecular Weight: 161.200 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	87-88°C
Boiling Point	314.6±12.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	142.8±19.7 °C
Exact Mass	161.084061
PSA	29.10000
LogP	2.82
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.548
Storage Conditions	2-8°C

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 1,2,3,4-Tetrahydrobenzo[b]azepin-5-one?

The CAS number of 1,2,3,4-Tetrahydrobenzo[b]azepin-5-one is 1127-74-8.

What are the molecular formula and molecular weight of 1,2,3,4-Tetrahydrobenzo[b]azepin-5-one?

1,2,3,4-Tetrahydrobenzo[b]azepin-5-one has molecular formula C10H11NO and molecular weight 161.200 g/mol.

What are the upstream and downstream products of 1,2,3,4-Tetrahydrobenzo[b]azepin-5-one?

For 1,2,3,4-Tetrahydrobenzo[b]azepin-5-one, Upstream Products: 1-(Toluene-4-sulfonyl)-1,2,3,4-tetrahydrobenzo[b]azepin-5-one, 1-Phenyl-2-pyrrolidinone; Downstream Products: 2,3,4,5-Tetrahydro-1H-benzo[b]azepine, 1-(4-Aminobenzoyl)-2,3,4,5-tetrahydro-1H-1-benzazepin-5-one, 1-(Toluene-4-sulfonyl)-1,2,3,4-tetrahydrobenzo[b]azepin-5-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. "1,2,3,4-Tetrahydrobenzo[b]azepin-5-one (CAS 1127-74-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30415-4 (accessed 2026-11-09).

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