4-Chloro-2-fluorophenyl isocyanate
4-Chloro-2-fluorophenyl isocyanate (CAS: 51163-28-1, Formula: ClC6H3(F)NCO) is a chemical intermediate with a molecular weight of 171.56 g/mol. This fluorinated aryl building block is primarily utilized in organic synthesis for the creation of more complex molecules. Its reactive isocyanate group allows for various chemical transformations, making it a valuable reagent in research and development settings.

Organic Synthesis
Serves as a key building block in the synthesis of diverse organic compounds, including pharmaceuticals and agrochemicals, leveraging its reactive isocyanate functionality.
Chemical Research
Employed in academic and industrial research laboratories for the development of novel materials and chemical entities requiring a fluorinated aromatic core.
Intermediate for Specialty Chemicals
Used as an intermediate in the production of specialty chemicals where the incorporation of a 4-chloro-2-fluorophenyl moiety is required.
| Molecular weight | 171.56 |
|---|---|
| Linear formula | ClC6H3(F)NCO |
| Assay | 97% |
| Boiling point | 201-202 °C(lit.) |
| Density | 1.354 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5400(lit.) |
| Storage temperature | 2-8°C |


Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H334May cause allergy or asthma symptoms if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
- P342
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 85 °C / 185 °F |
| Transport (UN / ADR) | NA 1993 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 36/37/38-42 |
| Safety statements (S) | 23-26-45 |
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-Chloro-2-fluorophenyl isocyanate used for?
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4-Chloro-2-fluorophenyl isocyanate is primarily used as a building block in organic synthesis for the creation of more complex molecules, particularly in the research and development of pharmaceuticals and agrochemicals.
What are the CAS number and molecular formula for this product?
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The CAS number is 51163-28-1 and the molecular formula is ClC6H3(F)NCO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Chloro-2-fluorophenyl isocyanate with an assay of 97%. This product is supplied for research and chemical synthesis purposes and is not represented as USP, BP, or EP grade.
What are the safety and handling considerations for 4-Chloro-2-fluorophenyl isocyanate?
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This compound is classified with GHS symbols GHS07 and GHS08, bearing the signal word 'Danger'. It has hazard statements including H315 (Causes skin irritation), H319 (Causes serious eye irritation), H334 (May cause allergy or asthma symptoms or breathing difficulties if inhaled), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including eyeshields, face shields, and suitable respiratory protection, is essential. Handle with extreme caution in a well-ventilated area.
How is this chemical packed, shipped, and exported?
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Tech Serve Solutions, as a global supplier and exporter, ensures appropriate packaging and adherence to regulations for the safe transport and export of chemicals like 4-Chloro-2-fluorophenyl isocyanate.
How can I request a sample or a quote for 4-Chloro-2-fluorophenyl isocyanate?
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To request a sample or a quote, please contact our sales department through the provided channels on our website, specifying the product name and CAS number.
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