4-Amino-2-thiophenecarboxylic acid

Also known as: 4-Aminothiophene-2-carboxylic acid, 4-Amino-2-thiophenecarboxylic Acid, 2-Thiophenecarboxylic acid, 4-amino-, 2-Thiophenecarboxylic acid,4-amino, 2-Thiophenecarboxylicacid,4-amino-(9CI), 4-AMINOTHIOPHENE-2-CARBOXYLIC ACID, 4-AMINOTHIOPHENE-2-CARBOXYLIC ACID USP/EP/BP, 4-AMino-2-thiophenecarboxylic Acid

4-Amino-2-thiophenecarboxylic acid (CAS 89499-38-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5NO2S and a molecular weight of 143.16400 g/mol. Key properties include a boiling point of 435.8ºC at 760 mmHg, a density of 1.527g/cm3 and a flash point of 217.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 89499-38-7
Jingsj CID: J-1394621-9
Molecular Formula: C₅H₅NO₂S
Molecular Weight: 143.16400 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	435.8ºC at 760 mmHg
Density	1.527g/cm3
Flash Point	217.4ºC
Exact Mass	143.00400
PSA	91.56000
LogP	1.60970
Refractive Index	1.689

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 4-Amino-2-thiophenecarboxylic acid?

The CAS number of 4-Amino-2-thiophenecarboxylic acid is 89499-38-7.

What are the molecular formula and molecular weight of 4-Amino-2-thiophenecarboxylic acid?

4-Amino-2-thiophenecarboxylic acid has molecular formula C5H5NO2S and molecular weight 143.16400 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. "4-Amino-2-thiophenecarboxylic acid (CAS 89499-38-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1394621-9 (accessed 2026-11-09).

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