5-(ethylthio)thiophene-2-carboxylic acid
5-(ethylthio)thiophene-2-carboxylic acid (CAS: 101861-40-9) is a heterocyclic organic compound with the molecular formula C7H8O2S2 and a molecular weight of 188.27 g/mol. This thiophene derivative serves as a valuable building block in organic synthesis. Its structure, featuring an ethylthio group and a carboxylic acid functional group attached to a thiophene ring, allows for diverse chemical transformations, making it useful in the development of novel compounds.

Organic Synthesis Intermediate
This compound is employed as a key intermediate in the synthesis of more complex organic molecules. Its functional groups can be readily modified through various reactions, facilitating the construction of diverse chemical structures.
Heterocyclic Chemistry Research
As a thiophene derivative, it is utilised in research focused on heterocyclic chemistry. The unique electronic and structural properties of the thiophene ring make it an attractive scaffold for developing new materials and pharmaceuticals.
Building Block for Novel Compounds
Its structured functionality makes 5-(ethylthio)thiophene-2-carboxylic acid a useful building block for creating novel compounds with potentially interesting properties in materials science or medicinal chemistry.
| Molecular weight | 188.27 |
|---|---|
| Empirical formula | C7H8O2S2 |

Hazard statements
- H315Causes skin irritation
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 38 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 5-(ethylthio)thiophene-2-carboxylic acid used for?
+
5-(ethylthio)thiophene-2-carboxylic acid is primarily used as a building block in organic synthesis and in research involving heterocyclic chemistry, particularly with thiophene derivatives.
What are the CAS number and formula for 5-(ethylthio)thiophene-2-carboxylic acid?
+
The CAS number is 101861-40-9 and the empirical formula is C7H8O2S2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies this compound as a research-grade chemical. We do not represent it as USP, BP, or EP grade.
How should 5-(ethylthio)thiophene-2-carboxylic acid be handled?
+
According to GHS, this compound is a Warning substance with hazard statement H315, indicating it causes skin irritation. Handle with appropriate personal protective equipment in a well-ventilated area.
Is this chemical available for international export?
+
Yes, Tech Serve Solutions specialises in the global supply and export of fine chemicals, including 5-(ethylthio)thiophene-2-carboxylic acid.
How can I request a sample or quote?
+
Please contact our sales team through the website or by phone to request a sample or a quotation for 5-(ethylthio)thiophene-2-carboxylic acid.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis