5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one

Also known as: 5-Methoxy-1,2,3,4-tetrahydroisoquinolin-1-one, 5-Methoxy-3,4-dihydro-2H-isoquinolin-1-one, 1(2H)-Isoquinolinone, 3,4-dihydro-5-methoxy-, 5-Methoxy-3,4-dihydro-1(2H)-isoquinolinone

5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one (CAS 129075-49-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H11NO2 and a molecular weight of 177.20000 g/mol. Key properties include a boiling point of 439.8ºC at 760 mmHg, a density of 1.159g/cm3 and a flash point of 219.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 129075-49-6
Jingsj CID: J-1518623-9
Molecular Formula: C₁₀H₁₁NO₂
Molecular Weight: 177.20000 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	439.8ºC at 760 mmHg
Density	1.159g/cm3
Flash Point	219.8ºC
Exact Mass	177.07900
PSA	38.33000
LogP	1.30990
Vapor Pressure	6.2E-08mmHg at 25°C
Refractive Index	1.548

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 5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one?

The CAS number of 5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one is 129075-49-6.

What are the molecular formula and molecular weight of 5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one?

5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one has molecular formula C10H11NO2 and molecular weight 177.20000 g/mol.

What are the upstream and downstream products of 5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one?

For 5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one, Upstream Products: 4-Methoxy-1-indanone, 5-hydroxy-3,4-dihydro-2H-isoquinolin-1-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. "5-Methoxy-3,4-dihydroisoquinolin-1(2H)-one (CAS 129075-49-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1518623-9 (accessed 2026-11-09).

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