C5H4OS
112.15 g/mol
Research ReagentWarning
2-Thiophenecarboxaldehyde
CAS98-03-3EC202-629-8
Category
Research Reagent
Compound Class
Heterocycle
Primary Use
Research Compound
2-Thiophenecarboxaldehyde is an organosulfur compound that exists as a colorless liquid, often developing an amber color upon storage. It is one of two isomeric thiophenecarboxaldehydes and serves as a building block in organic synthesis.
organic synthesis building block
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Safety Reference
Warning
H302Harmful if swallowed
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 2-Thiophenecarboxaldehyde (CAS 98-03-3) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
thiophene-2-carbaldehyde
InChIKey
CNUDBTRUORMMPA-UHFFFAOYSA-N
SMILES
C1=CSC(=C1)C=O
Synonyms (38)
- Pyrantel Embonate EP Impurity C
- Thiophene-2-carbaldehyde; Pyrantel Embonate Imp. C (EP)
- .ALPHA.-THIOPHENALDEHYDE
- 2-Carboxaldehyde-thiophene
- 2-FORMYLTHIOFURAN
- 2-FORMYLTHIOPHENE
- 2-THIENYLCARBALDEHYDE
- 2-THIOFURANCARBOXALDEHYDE
- 2-THIOPHENENECARBOXALDEHYDE
- 2-Thenaldehyde
- 2-Thienaldehyde
- 2-Thienylaldehyde
- 2-Thienylcarboxaldehyde
- 2-Thiophenaldehyde
- 2-Thiophenealdehyde
- 2-Thiophenecarbaldehyde
- 2-Thiophenecarboxaldehyde
- 2-Thiophenic aldehyde
- 2-thienal
- 2-thiophencarbaldehyde
- 2-thiophencarboxaldehyde
- 2-thiophene carboxyaldehyde
- PYRANTEL EMBONATE IMPURITY C
- Pyrantel impurity C CRS
- Thenaldehyde
- a-Thenaldehyde
- alpha-Formylthiophene
- alpha-Thiophenecarboxaldehyde
- formylthiophene
- thiophen 2-carbaldehyde
- thiophenaldehyde
- thiophene 2-carbaldehyde
- thiophene-o-carboxaldehyde
- thiophenealdehyde
- thiophenecarboxaldehyde
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