5-Methoxyindole-3-acetic acid

Also known as: 5-Methoxy-3-indoleacetic acid, 2-(5-Methoxy-1H-indol-3-yl)acetic acid, 2-(5-Methoxy-3-indolyl)acetic acid, 5-Methoxyindol-3-ylacetic acid, 5-Methoxy-1H-indole-3-acetic acid, 5-Methoxyindoleacetic acid, Methoxyindoleacetic acid, 5-MeO-IAA, 5-Methoxy-IAA, RARECHEM AL BO 1466, TIMTEC-BB SBB003497, MFCD00005638

5-Methoxyindole-3-acetic acid (CAS 3471-31-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H11NO3 and a molecular weight of 205.21000 g/mol. Key properties include a melting point of 145-148 °C (dec.)(lit.), a boiling point of 445.9ºC at 760 mmHg and a flash point of 223.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3471-31-6
Jingsj CID: J-11748-6
Molecular Formula: C₁₁H₁₁NO₃
Molecular Weight: 205.21000 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	145-148 °C (dec.)(lit.)
Boiling Point	445.9ºC at 760 mmHg
Flash Point	223.5ºC
Exact Mass	205.07400
PSA	62.32000
LogP	1.80360
Additional Property	insoluble

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. KVEDER S, et al. The metabolism of melatonin (N-acetyl-5-methoxytryptamine) and 5-methoxytryptamine. J Biol Chem. 1961 Dec;236:3214-20.

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 5-Methoxyindole-3-acetic acid?

The CAS number of 5-Methoxyindole-3-acetic acid is 3471-31-6.

What are the molecular formula and molecular weight of 5-Methoxyindole-3-acetic acid?

5-Methoxyindole-3-acetic acid has molecular formula C11H11NO3 and molecular weight 205.21000 g/mol.

What are the upstream and downstream products of 5-Methoxyindole-3-acetic acid?

For 5-Methoxyindole-3-acetic acid, Upstream Products: 5-Methoxyindole-3-acetonitrile, 5-Methoxy-1H-indole-3-acetic acid methyl ester, 5-Methoxyindole; Downstream Products: Bufotenine, 5-Methoxy-1H-indole-3-acetic acid methyl ester, 5-Methoxytryptophol.

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. "5-Methoxyindole-3-acetic acid (CAS 3471-31-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11748-6 (accessed 2026-11-09).

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