trans-4-Fluorocinnamaldehyde
Trans-4-Fluorocinnamaldehyde (CAS 51791-26-5) is an organofluorine compound with the molecular formula C9H7FO and a molecular weight of 150.15 g/mol. This aldehyde, characterized by a fluorine atom on the phenyl ring and an unsaturated side chain, serves as a valuable building block in organic synthesis. It is primarily utilised in the development of novel organic compounds, pharmaceuticals, and agrochemicals, offering a unique reactive profile for advanced chemical research and development.
- IUPAC
- (E)-3-(4-Fluorophenyl)-2-propenal
- Synonyms
- (E)-3-(4-Fluorophenyl)-2-propenal

Organic Synthesis Intermediate
As a fluorinated building block, trans-4-Fluorocinnamaldehyde is employed in complex organic synthesis pathways. Its aldehyde and alkene functionalities allow for diverse reactions, facilitating the construction of intricate molecular architectures.
Pharmaceutical Research
This compound is a key intermediate in the synthesis of potential pharmaceutical agents. The presence of fluorine can significantly influence the pharmacokinetic properties of drug candidates, making it attractive for medicinal chemistry.
Agrochemical Development
Trans-4-Fluorocinnamaldehyde finds application in the research and development of new agrochemicals. Its structure can be incorporated into molecules designed for crop protection or pest control.
Material Science
The unique electronic and structural properties imparted by the fluorine atom and the conjugated system make this compound of interest for developing novel materials with specific optical or electronic characteristics.
| Molecular weight | 150.15 |
|---|---|
| Empirical formula | C9H7FO |
| Assay | 95% |
| Density | 1.146 g/mL at 25 °C |
| Refractive index | n20/D 1.599 |


Hazard statements
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | >110 °C / >230 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-41 |
| 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 Trans-4-Fluorocinnamaldehyde used for?
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Trans-4-Fluorocinnamaldehyde is used as a building block in organic synthesis, particularly for pharmaceuticals, agrochemicals, and materials science research.
What are the CAS number and formula for Trans-4-Fluorocinnamaldehyde?
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The CAS number is 51791-26-5 and the molecular formula is C9H7FO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Trans-4-Fluorocinnamaldehyde with a minimum assay of 95%. This product is not guaranteed to be USP, BP, EP, or pharmaceutical grade.
What are the safety and handling precautions for Trans-4-Fluorocinnamaldehyde?
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Trans-4-Fluorocinnamaldehyde is classified as Danger (H302-H318), indicating it is harmful if swallowed and causes serious eye damage. Appropriate personal protective equipment, including a dust mask (N95 US), eyeshields, and gloves, must be worn. Handle in a well-ventilated area and avoid contact with eyes and skin.
How is Trans-4-Fluorocinnamaldehyde packed, shipped, and exported?
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Tech Serve Solutions exports fine chemicals globally, ensuring appropriate packaging according to international shipping regulations for chemical substances.
How can I request a sample or quote for Trans-4-Fluorocinnamaldehyde?
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To request a sample or a quote, please contact our sales department through the website or by phone, providing your specific requirements.
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