4H-Thieno[3,2-b]pyrrole-5-carboxylic acid

Also known as: 4H-thieno[2,3-d]pyrrole-5-carboxylic acid, Thieno[2,3-b]pyrrole-5-carboxylic acid, D-Amino Acid Oxidase Inhibitor, AKOS BB-9991, CHEMBRDG-BB 4012315

4H-Thieno[3,2-b]pyrrole-5-carboxylic acid (CAS 39793-31-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5NO2S and a molecular weight of 167.19 g/mol. Key properties include a melting point of 180ºC, a boiling point of 437.4±25.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 218.3±23.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 39793-31-2
Jingsj CID: J-1972877-9
Molecular Formula: C₇H₅NO₂S
Molecular Weight: 167.19 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	180ºC
Boiling Point	437.4±25.0 °C at 760 mmHg
Density	1.6±0.1 g/cm3
Flash Point	218.3±23.2 °C
Exact Mass	167.004105
PSA	81.33000
LogP	3.24
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.786

Activity & Biological Data

Additional Information	[1]. Tim Sparey, et, al. The discovery of fused pyrrole carboxylic acids as novel, potent D-amino acid oxidase (DAO) inhibitors. Bioorg Med Chem Lett. 2008,18, 11.

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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 4H-Thieno[3,2-b]pyrrole-5-carboxylic acid?

The CAS number of 4H-Thieno[3,2-b]pyrrole-5-carboxylic acid is 39793-31-2.

What are the molecular formula and molecular weight of 4H-Thieno[3,2-b]pyrrole-5-carboxylic acid?

4H-Thieno[3,2-b]pyrrole-5-carboxylic acid has molecular formula C7H5NO2S and molecular weight 167.19 g/mol.

What are the upstream and downstream products of 4H-Thieno[3,2-b]pyrrole-5-carboxylic acid?

For 4H-Thieno[3,2-b]pyrrole-5-carboxylic acid, Upstream Products: Ethyl 4H-thieno[3,2-b]pyrrole-5-carboxylate, Methyl 4H-thieno[3,2-b]pyrrole-5-carboxylate, 2-Thiophenecarboxaldehyde; Downstream Products: Ethyl 4H-thieno[3,2-b]pyrrole-5-carboxylate, 4H-Thieno[3,2-b]pyrrole-5-carbonyl chloride, Methyl 4H-thieno[3,2-b]pyrrole-5-carboxylate.

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. "4H-Thieno[3,2-b]pyrrole-5-carboxylic acid (CAS 39793-31-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1972877-9 (accessed 2026-11-09).

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