Indole-5-carboxylic acid
Also known as: 5-Carboxyindole, 5-Indolecarboxylic acid, 1H-Indole-5-carboxylic acid
Indole-5-carboxylic acid (CAS 1670-81-1) 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 211-213 °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.
- 1670-81-1
- Jingsj CID
- J-1089619-2
- Molecular Formula
- C9H7NO2
- Molecular Weight
- 161.157 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 211-213 °C(lit.) |
|---|---|
| Boiling Point | 419.6±18.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 207.6±21.2 °C |
| Exact Mass | 161.047684 |
| PSA | 53.09000 |
| LogP | 1.82 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.726 |
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 Indole-5-carboxylic acid?
The CAS number of Indole-5-carboxylic acid is 1670-81-1.
What are the molecular formula and molecular weight of Indole-5-carboxylic acid?
Indole-5-carboxylic acid has molecular formula C9H7NO2 and molecular weight 161.157 g/mol.
What are the upstream and downstream products of Indole-5-carboxylic acid?
For Indole-5-carboxylic acid, Upstream Products: 5-Iodo-1H-indole, Carbon dioxide, 5-Bromoindole; Downstream Products: Ethyl 1H-indole-5-carboxylate, 2,3-dihydro-1-benzofuran-5-carbonyl chloride, 3-Bromoindole-5-carboxylic 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-5-carboxylic acid (CAS 1670-81-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1089619-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.