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Indole-2-carboxylic acid

Also known as: 1H-Indole-2-carboxylic acid, 2-Carboxyindole, 2-Indolecarboxylic acid, NSC 16598, MFCD00005611, Indole-2-carboxylate, Indole-2-carboxylic acid (I2CA)

Indole-2-carboxylic acid (CAS 1477-50-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H7NO2 and a molecular weight of 161.157 g/mol. Key properties include a melting point of 202-206 °C(lit.), a boiling point of 419.6±18.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 207.6±21.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1477-50-5
Jingsj CID
J-38366-4
Molecular Formula
C9H7NO2
Molecular Weight
161.157 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point202-206 °C(lit.)
Boiling Point419.6±18.0 °C at 760 mmHg
Density1.4±0.1 g/cm3
Flash Point207.6±21.2 °C
Exact Mass161.047684
PSA53.09000
LogP2.31
Vapor Pressure0.0±1.0 mmHg at 25°C
Refractive Index1.726

Activity & Biological Data

TargetHuman Endogenous Metabolite
Additional Information[1]. 2-Indolecarboxylic acid. [2]. J E Huettner, et al. Indole-2-carboxylic Acid: A Competitive Antagonist of Potentiation by Glycine at the NMDA Receptor. Science. 1989 Mar 24;243(4898):1611-3.

Customs & Trade Information

HS Code2933990090
Summary2933990090. 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 Indole-2-carboxylic acid?

The CAS number of Indole-2-carboxylic acid is 1477-50-5.

What are the molecular formula and molecular weight of Indole-2-carboxylic acid?

Indole-2-carboxylic acid has molecular formula C9H7NO2 and molecular weight 161.157 g/mol.

What are the upstream and downstream products of Indole-2-carboxylic acid?

For Indole-2-carboxylic acid, Upstream Products: Ethyl indole-2-carboxylate, 1H-Indole-2-carboxaldehyde, 2-Iodoaniline; Downstream Products: (2R)-1-acetyl-2,3-dihydro-1H-indole-2-carboxylic acid, 1H-Indole-2-carbohydrazide, Indole-2-acetic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Indole-2-carboxylic acid (CAS 1477-50-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38366-4 (accessed 2026-11-09).

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