5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one

Also known as: 1,3-dihydro-5-methyl-2H-1,4-benzodiazepin-2-one, Ro 5-3663, Ro 05-3663, 5-methyl-3,4-dihydro-1,4-benzodiazepin-2-one, 5-methyl-1,3-dihydro-2H-benzo[e][1,4]diazepin-2-one, 2H-1,4-Benzodiazepin-2-one, 1,3-dihydro-5-methyl-, 5-methyl-1,2-dihydro-3H-1,4-benzodiazepine-2-one, 5-methyl-3,4-dihydro-2H-1,4-benzodiazepin-2-one

5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one (CAS 70656-87-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H10N2O and a molecular weight of 174.19900 g/mol. Key properties include a boiling point of 362.3ºC at 760mmHg, a density of 1.22g/cm3 and a flash point of 172.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 70656-87-0
Jingsj CID: J-928275-1
Molecular Formula: C₁₀H₁₀N₂O
Molecular Weight: 174.19900 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	362.3ºC at 760mmHg
Density	1.22g/cm3
Flash Point	172.9ºC
Exact Mass	174.07900
PSA	41.46000

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 5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one?

The CAS number of 5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one is 70656-87-0.

What are the molecular formula and molecular weight of 5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one?

5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one has molecular formula C10H10N2O and molecular weight 174.19900 g/mol.

What are the upstream and downstream products of 5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one?

For 5-Methyl-1H-benzo[e][1,4]diazepin-2(3H)-one, Downstream Products: 2-(chloromethyl)-4-methylquinazoline.

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-1H-benzo[e][1,4]diazepin-2(3H)-one (CAS 70656-87-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-928275-1 (accessed 2026-11-09).

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