Molecular properties
- Formula
- C5H4O2S
- Molar mass
- 128.15 g·mol−1
- Exact mass
- 127.9932 Da
- 4
- PubChem CID
- 10700
Molecule record
thiophene-2-carboxylic acid
C5H4O2S
128.15 g/mol
Loading structure
Functional groups
Carboxylic acid
Physical properties
No source-backed physical properties are curated for this molecule yet.
Common names and synonyms
- 2-Carboxythiophene
- 2-TCA
- 2-THIOPHENECARBOXYLIC ACID [MI]
- 2-Thenoic acid
- 2-Thienylcarboxylic acid
- 2-Thiophenecarboxylic acid
- 2Carboxythiophene
- 2Thenoic acid
Show all 24 synonyms
- 2Thiophenic acid
- 5-18-06-00158 (Beilstein Handbook Reference)
- 527-72-0
- AI3-16118
- BRN 0110150
- DTXSID2060177
- EINECS 208-423-4
- NSC 2188
- Rhinotrophyl
- Rhinotrophyl (TN)
- THENOIC ACID [WHO-DD]
- Tenoic acid
- Tenoic acid (DCF)
- Thenoic acid
- Thiophene-2-carbixylic acid
- Thiophene2carboxylate
Structure identifiers
- Canonical SMILES
- O=C(O)c1cccs1
- Isomeric SMILES
- C1=CSC(=C1)C(=O)O
- InChI
- InChI=1S/C5H4O2S/c6-5(7)4-2-1-3-8-4/h1-3H,(H,6,7)
- InChIKey
- QERYCTSHXKAMIS-UHFFFAOYSA-N
- PubChem CID
- 10700
Spectroscopy
Tabs appear only for spectra stored with clear provenance.
No redistributable or simulated spectroscopy record is attached yet.
Simulated NMR
On-demand educational prediction for thiophene-2-carboxylic acid; not experimental data.
Simulated EI mass spectrum
On-demand educational fragmentation for thiophene-2-carboxylic acid; not experimental data.
Sources
Molecule identity
Retrieved 8/20/2026. Reuse status is summarized by the badge; open the source for full details.