Potassium 5-formylthiophene-3-trifluoroborate
Potassium 5-formylthiophene-3-trifluoroborate (CAS: 907604-61-9; Formula: C5H3BF3KOS; MW: 218.05) is a heteroaryl trifluoroborate salt. It serves as a valuable building block in organic synthesis, particularly for introducing the 5-formylthiophene-3-yl moiety into complex molecules. Its utility is primarily in research and development settings for creating novel organic compounds with potential applications in medicinal chemistry and materials science.
- IUPAC
- Potassium 5-formylthiophen-3-yltrifluoroborate,Potassium trifluoro(5-formylthien-3-yl)borate

Organic Synthesis
Utilised as a key intermediate in the synthesis of complex organic molecules. Its trifluoroborate functionality allows for participation in various cross-coupling reactions, enabling the formation of new carbon-carbon bonds.
Medicinal Chemistry Research
A versatile reagent for the development of novel pharmaceutical candidates. The thiophene core and formyl group can be further modified to explore structure-activity relationships in drug discovery programs.
Materials Science
Incorporated into the design of new functional materials. The thiophene unit is a common motif in organic electronic materials, and this reagent provides a convenient route for its functionalization.
| Molecular weight | 218.05 |
|---|---|
| Empirical formula | C5H3BF3KOS |
| Assay | 95% |
| Melting point | 262-273 °C |

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
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
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 Potassium 5-formylthiophene-3-trifluoroborate used for?
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Potassium 5-formylthiophene-3-trifluoroborate is primarily used as a building block in organic synthesis and medicinal chemistry research for creating novel organic compounds.
What are the CAS number and chemical formula?
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The CAS number is 907604-61-9, and the chemical formula is C5H3BF3KOS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound at a minimum purity of 95% as a technical grade for research purposes. It is not represented as USP, BP, EP, or any other pharmacopoeial standard.
How should Potassium 5-formylthiophene-3-trifluoroborate be handled?
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This compound is a warning hazardous substance. It may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment in a well-ventilated area.
How is this product packed and shipped?
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Products are carefully packed to ensure integrity during transit and are exported globally by Tech Serve Solutions, adhering to all necessary shipping regulations.
How can I request a sample or quote?
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Please contact our sales department via the website or phone to request a sample or a detailed quotation for this product.
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