2,5-Thiophenedicarboxylic acid
2,5-Thiophenedicarboxylic acid (CAS: 4282-31-9) is a heterocyclic organic compound with a molecular weight of 172.16 g/mol. This thiophene derivative serves as a valuable building block in chemical synthesis, particularly for the creation of complex organic molecules and polymers. Its dicarboxylic acid functionality allows for diverse chemical modifications and incorporation into various molecular architectures, making it a useful intermediate in research and development.
- Synonyms
- 2,5-Thiophenedicarboxylic acidThiophene-2,5-dicarboxylic acid

Organic Synthesis Intermediate
Utilised as a key intermediate in the synthesis of advanced organic compounds. Its structure is amenable to various reactions, facilitating the construction of novel molecular frameworks.
Polymer Science
Serves as a monomer or co-monomer in the development of specialty polymers. The thiophene ring and carboxylic acid groups can impart unique electronic or structural properties to the resulting polymer chains.
Materials Research
Employed in the exploration of new materials, including conductive polymers and functional organic materials. Its inclusion in material design can influence properties such as conductivity and thermal stability.
Pharmaceutical and Agrochemical Research
A potential precursor in the research pathways for new pharmaceutical agents and agrochemicals, where heterocyclic structures are often integral to biological activity.
| Molecular weight | 172.16 |
|---|---|
| Empirical formula | C6H4O4S |
| Assay | 99% |
| Melting point | >300 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 2,5-Thiophenedicarboxylic acid used for?
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2,5-Thiophenedicarboxylic acid is primarily used as a building block in organic synthesis, for developing specialty polymers, and in materials research. It acts as a versatile intermediate for constructing complex organic molecules.
What is the CAS number and formula for 2,5-Thiophenedicarboxylic acid?
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The CAS number for 2,5-Thiophenedicarboxylic acid is 4282-31-9, and its empirical formula is C6H4O4S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2,5-Thiophenedicarboxylic acid with an assay of 99%. This product is typically suitable for research and chemical synthesis applications. TSS does not represent this product as USP, BP, or EP grade.
How should 2,5-Thiophenedicarboxylic acid be handled?
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2,5-Thiophenedicarboxylic acid is classified with GHS07 symbol and a Warning signal word. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). When handling, use a dust mask type N95 (US), wear eyeshields, and gloves. Ensure good ventilation and avoid breathing dust.
Is 2,5-Thiophenedicarboxylic acid a controlled substance?
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Based on the provided data, 2,5-Thiophenedicarboxylic acid is not indicated as a controlled substance.
How is 2,5-Thiophenedicarboxylic acid packed and exported?
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2,5-Thiophenedicarboxylic acid is carefully packed to ensure safe transit and is available for export globally by Tech Serve Solutions.
How can I request a quote or sample for 2,5-Thiophenedicarboxylic acid?
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To request a quote or sample, please contact our sales team through the website or by phone, referencing product CAS number 4282-31-9.
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