3-Bromobenzothiophene-2-carboxylic acid
3-Bromobenzothiophene-2-carboxylic acid (CAS: 29174-66-1; Formula: C9H5BrO2S; MW: 257.10) is a halogenated heterocyclic compound utilised as a versatile building block in chemical synthesis. Its structure, featuring a benzothiophene core with bromine and carboxylic acid substituents, makes it valuable for constructing more complex molecules. Primarily employed in research and development, this compound serves as a key intermediate in the synthesis of novel organic materials and potential pharmaceutical agents.

Organic Synthesis Intermediate
Serves as a crucial building block in the synthesis of complex organic molecules. Its functional groups allow for diverse chemical transformations and derivatizations.
Pharmaceutical Research
Used in the development of new pharmaceutical agents and drug discovery programs. The benzothiophene scaffold is present in various biologically active compounds.
Materials Science
Applicable in the synthesis of novel materials with specific electronic or optical properties, leveraging the heterocyclic aromatic system.
| Molecular weight | 257.10 |
|---|---|
| Empirical formula | C9H5BrO2S |
| Assay | 97% |
| Melting point | 275-279 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-43 |
| Safety statements (S) | 36/37 |
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 3-Bromobenzothiophene-2-carboxylic acid used for?
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3-Bromobenzothiophene-2-carboxylic acid is primarily used as a building block in organic synthesis, particularly in pharmaceutical research and materials science for creating complex molecules.
What is the CAS number and molecular formula?
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The CAS number for 3-Bromobenzothiophene-2-carboxylic acid is 29174-66-1, and its molecular formula is C9H5BrO2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Bromobenzothiophene-2-carboxylic acid with a minimum assay of 97%. We do not represent this product as USP, EP, or BP grade.
How should 3-Bromobenzothiophene-2-carboxylic acid be handled safely?
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This compound is harmful if swallowed and may cause an allergic skin reaction. Handle with appropriate personal protective equipment including a dust mask (N95), eyeshields, face shields, and gloves. Ensure adequate ventilation.
Is this chemical a controlled substance?
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The provided data does not indicate that 3-Bromobenzothiophene-2-carboxylic acid is a controlled substance.
How are your chemicals packed and shipped?
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Tech Serve Solutions exports chemicals globally, ensuring appropriate packaging for safe transit and compliance with international shipping regulations.
How can I request a quote or sample?
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To request a quote or sample of 3-Bromobenzothiophene-2-carboxylic acid, please contact our sales team through the website or by phone.
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