4-Methyl-3,4-dihydro-2H-isoquinolin-1-one

Also known as: 1(2H)-Isoquinolinone, 3,4-dihydro-4-methyl-, 4-methyl-3,4-dihydroisoquinolin-1(2H)-one, 4-Methyl-3,4-dihydro-1(2H)-isoquinolinone, 3,4-Dihydro-4-methyl-1(2H)-isoquinolinone

4-Methyl-3,4-dihydro-2H-isoquinolin-1-one (CAS 70079-42-4) is a compound in the Pharma Intermediates 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 boiling point of 349.2±22.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 204.3±7.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 70079-42-4
Jingsj CID: J-1140013-8
Molecular Formula: C₁₀H₁₁NO
Molecular Weight: 161.200 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	349.2±22.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	204.3±7.3 °C
Exact Mass	161.084061
PSA	29.10000
LogP	1.28
Vapor Pressure	0.0±0.8 mmHg at 25°C
Refractive Index	1.539

Customs & Trade Information

HS Code	2933790090
Summary	2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 4-Methyl-3,4-dihydro-2H-isoquinolin-1-one?

The CAS number of 4-Methyl-3,4-dihydro-2H-isoquinolin-1-one is 70079-42-4.

What are the molecular formula and molecular weight of 4-Methyl-3,4-dihydro-2H-isoquinolin-1-one?

4-Methyl-3,4-dihydro-2H-isoquinolin-1-one has molecular formula C10H11NO and molecular weight 161.200 g/mol.

What are the upstream and downstream products of 4-Methyl-3,4-dihydro-2H-isoquinolin-1-one?

For 4-Methyl-3,4-dihydro-2H-isoquinolin-1-one, Upstream Products: 2-Phenylpropylamine, 4-Methyl-1,2,3,4-tetrahydroisoquinoline; Downstream Products: 4-Methyl-1,2,3,4-tetrahydroisoquinoline.

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-Methyl-3,4-dihydro-2H-isoquinolin-1-one (CAS 70079-42-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1140013-8 (accessed 2026-11-09).

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