1-butyl-1H-indole-2,3-dione

Also known as: 1-butylindole-2,3-dione, 1-butyl-1H-indole-2,3-dione, 1-butylindoline-2,3-dione, 1-butylisatin, N-butylisatin, N-(n-butyl)isatin, 1-butylbenzo[d]azolidine-2,3-dione, AKOS BBS-00006504, AKOS BC-1700, TIMTEC-BB SBB006836

1-butyl-1H-indole-2,3-dione (CAS 4290-91-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H13NO2 and a molecular weight of 203.23700 g/mol. Key properties include a boiling point of 332.6ºC at 760mmHg, a density of 1.173g/cm3 and a flash point of 146.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4290-91-9
Jingsj CID: J-1170074-6
Molecular Formula: C₁₂H₁₃NO₂
Molecular Weight: 203.23700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	332.6ºC at 760mmHg
Density	1.173g/cm3
Flash Point	146.3ºC
Exact Mass	203.09500
PSA	37.38000
LogP	2.08100
Refractive Index	1.562

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 1-butyl-1H-indole-2,3-dione?

The CAS number of 1-butyl-1H-indole-2,3-dione is 4290-91-9.

What are the molecular formula and molecular weight of 1-butyl-1H-indole-2,3-dione?

1-butyl-1H-indole-2,3-dione has molecular formula C12H13NO2 and molecular weight 203.23700 g/mol.

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. "1-butyl-1H-indole-2,3-dione (CAS 4290-91-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1170074-6 (accessed 2026-11-09).

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