4-(4-Fluorophenoxy)benzoic acid
4-(4-Fluorophenoxy)benzoic acid (CAS: 129623-61-6) is a fluorinated organic compound with the molecular formula FC6H4OC6H4CO2H and a molecular weight of 232.21 g/mol. This benzoic acid derivative serves as a valuable building block in organic synthesis. Its structure, featuring both a fluorophenoxy and a benzoic acid moiety, makes it a versatile intermediate for the development of more complex molecules across various chemical research and development sectors.

Organic Synthesis Intermediate
This compound is utilized as a key intermediate in the synthesis of novel organic molecules. The presence of the fluorine atom and carboxylic acid group allows for diverse chemical transformations and functionalizations in complex synthetic routes.
Fluorinated Building Block
As an organic fluorinated building block, it is employed in research and development for introducing fluorinated aryl ether structures into target compounds. This is particularly relevant in the fields of materials science and medicinal chemistry.
Research and Development
Primarily used in laboratory settings for chemical research, exploring new reactions, and developing novel compounds with potential applications in pharmaceuticals, agrochemicals, and advanced materials.
| Molecular weight | 232.21 |
|---|---|
| Linear formula | FC6H4OC6H4CO2H |
| Assay | 97% |
| Melting point | 171-175 °C |


Hazard statements
- H302Harmful if swallowed
- H319Causes serious eye irritation
- H400Very toxic to aquatic life
Precautionary statements
- P273Avoid release to the environment
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-36-50/53 |
| Safety statements (S) | 26-60-61 |
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 4-(4-Fluorophenoxy)benzoic acid used for?
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4-(4-Fluorophenoxy)benzoic acid is primarily used as a building block and intermediate in organic synthesis, particularly for research and development purposes in areas like medicinal chemistry and materials science.
What are the CAS number and formula for 4-(4-Fluorophenoxy)benzoic acid?
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The CAS number is 129623-61-6 and the molecular formula is FC6H4OC6H4CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-(4-Fluorophenoxy)benzoic acid with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 4-(4-Fluorophenoxy)benzoic acid be handled safely?
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Handle with appropriate personal protective equipment including a dust mask (N95 US recommended), eyeshields, and gloves. Avoid contact with skin, eyes, and clothing. Ensure adequate ventilation and prevent release to the environment, as it is harmful if swallowed, causes serious eye irritation, and is toxic to aquatic life with long-lasting effects.
Is 4-(4-Fluorophenoxy)benzoic acid a controlled substance?
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The provided data does not indicate that 4-(4-Fluorophenoxy)benzoic acid is a controlled substance.
How is 4-(4-Fluorophenoxy)benzoic acid packed and exported?
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This chemical is packed according to safety regulations for shipping, including UN 3077 classification for transport. Tech Serve Solutions is experienced in exporting fine chemicals globally.
How can I request a sample or quote for 4-(4-Fluorophenoxy)benzoic acid?
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Please contact our sales team via the website or by phone to request a sample or a formal quotation for 4-(4-Fluorophenoxy)benzoic acid.
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