2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one

Also known as: 1H-Pyrido[4,3-b]indol-1-one, 2,3,4,5-tetrahydro-5-methyl-, 5-Methyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indol-1-one, 5-Methyl-3,4-dihydro-2H-pyrido[4,3-b]indol-1(5H)-one, Alosetron Intermediate, MFCD08458716

2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one (CAS 122852-75-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H12N2O and a molecular weight of 200.236 g/mol. Key properties include a boiling point of 508.0±39.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 261.1±27.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 122852-75-9
Jingsj CID: J-1503652-9
Molecular Formula: C₁₂H₁₂N₂O
Molecular Weight: 200.236 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	508.0±39.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	261.1±27.1 °C
Exact Mass	200.094955
PSA	34.03000
LogP	1.11
Vapor Pressure	0.0±1.3 mmHg at 25°C
Refractive Index	1.686
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 2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one?

The CAS number of 2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one is 122852-75-9.

What are the molecular formula and molecular weight of 2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one?

2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one has molecular formula C12H12N2O and molecular weight 200.236 g/mol.

What are the upstream and downstream products of 2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one?

For 2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one, Upstream Products: iodomethane, 4-(2-Methyl-2-phenylhydrazinyl)-5,6-dihydropyridin-2(1H)-one, Dimethyl sulfate; Downstream Products: Alosetron.

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. "2,3,4,5-Tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one (CAS 122852-75-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1503652-9 (accessed 2026-11-09).

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