2,3,4,9-Tetrahydro-1H-carbazol-1-one

Also known as: 1H-Carbazol-1-one, 2,3,4,9-tetrahydro-, 2,3,4,9-tetrahydrocarbazol-1-one, 3,4-dihydro-2H-carbazol-1(9H)-one, 1-oxo-2,3,4,9-tetrahydrocarbazole, 1,2,3,4-tetrahydrocarbazole-1-one, AKOS BC-0293, RARECHEM AK MA K050

2,3,4,9-Tetrahydro-1H-carbazol-1-one (CAS 3456-99-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C12H11NO and a molecular weight of 185.22200 g/mol. Key properties include a melting point of 164-165ºC, a boiling point of 386.3ºC at 760mmHg, a density of 1.275g/cm3 and a flash point of 194.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3456-99-3
Jingsj CID: J-1312983-4
Molecular Formula: C₁₂H₁₁NO
Molecular Weight: 185.22200 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	164-165ºC
Boiling Point	386.3ºC at 760mmHg
Density	1.275g/cm3
Flash Point	194.5ºC
Exact Mass	185.08400
PSA	32.86000
LogP	2.68690
Refractive Index	1.689

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 2,3,4,9-Tetrahydro-1H-carbazol-1-one?

The CAS number of 2,3,4,9-Tetrahydro-1H-carbazol-1-one is 3456-99-3.

What are the molecular formula and molecular weight of 2,3,4,9-Tetrahydro-1H-carbazol-1-one?

2,3,4,9-Tetrahydro-1H-carbazol-1-one has molecular formula C12H11NO and molecular weight 185.22200 g/mol.

What are the upstream and downstream products of 2,3,4,9-Tetrahydro-1H-carbazol-1-one?

For 2,3,4,9-Tetrahydro-1H-carbazol-1-one, Upstream Products: Indole-3-butyric acid, Ethyl 2-oxocyclohexanecarboxylate, 1,2,3,4-Tetrahydrocarbazole; Downstream Products: Carbazole, 1,2,3,4-Tetrahydrocarbazole, 11,12-Dihydroindolo[2,3-a]carbazole.

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. "2,3,4,9-Tetrahydro-1H-carbazol-1-one (CAS 3456-99-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1312983-4 (accessed 2026-11-09).

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