4-Bromo-2-ethylphenyl isocyanate
4-Bromo-2-ethylphenyl isocyanate (CAS: 480439-24-5; Formula: CH3CH2C6H3(Br)NCO) is a valuable organic intermediate with a molecular weight of 226.07 g/mol. This compound serves as a reactive building block in chemical synthesis, particularly for introducing the 4-bromo-2-ethylphenyl moiety into larger molecules. It is widely employed in the development of pharmaceuticals, agrochemicals, and materials science research. TSS offers this isocyanate with a minimum assay of 95%.

Organic Synthesis Intermediate
4-Bromo-2-ethylphenyl isocyanate is utilised as a reactive intermediate in the synthesis of complex organic molecules. Its isocyanate group readily reacts with nucleophiles, enabling the formation of ureas, carbamates, and other functional groups.
Pharmaceutical Research
This compound can be a key building block in the discovery and development of new pharmaceutical agents. The introduction of the brominated ethylphenyl group may impart specific pharmacological properties to target molecules.
Agrochemical Development
The isocyanate functionality allows for its incorporation into novel agrochemical compounds, such as herbicides, insecticides, or fungicides. Its structure can be modified to optimise biological activity and environmental profiles.
Materials Science
It finds application in materials science for the synthesis of specialised polymers and functional materials. The reactive isocyanate group can participate in polymerisation reactions or surface modification processes.
| Molecular weight | 226.07 |
|---|---|
| Linear formula | CH3CH2C6H3(Br)NCO |
| Assay | 95% |
| Boiling point | 253-254 °C(lit.) |
| Density | 1.449 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5760(lit.) |



Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H334May cause allergy or asthma symptoms if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- 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 | 59 °C / 138.2 °F |
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-20/21/22-36/37/38 |
| Safety statements (S) | 26-36 |
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-Bromo-2-ethylphenyl isocyanate used for?
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4-Bromo-2-ethylphenyl isocyanate is primarily used as a reactive intermediate in organic synthesis, including the development of pharmaceuticals, agrochemicals, and advanced materials. It serves as a building block for introducing the 4-bromo-2-ethylphenyl group into target molecules.
What is the CAS number and chemical formula for 4-Bromo-2-ethylphenyl isocyanate?
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The CAS number is 480439-24-5 and the chemical formula is CH3CH2C6H3(Br)NCO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Bromo-2-ethylphenyl isocyanate with a minimum assay of 95%. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the main safety hazards associated with 4-Bromo-2-ethylphenyl isocyanate?
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This compound is a Danger due to flammability (H226), and is harmful if swallowed (H302), in contact with skin (H312), or if inhaled (H332). It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335) and allergy or asthma symptoms or breathing difficulties if inhaled (H334).
How is 4-Bromo-2-ethylphenyl isocyanate shipped and exported?
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4-Bromo-2-ethylphenyl isocyanate is shipped and exported according to international regulations for hazardous materials. It is classified under UN 1993C 3 / PGIII. Please contact us for specific shipping and export inquiries.
How can I request a quote or sample for 4-Bromo-2-ethylphenyl isocyanate?
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To request a quote or sample of 4-Bromo-2-ethylphenyl isocyanate, please use the 'Request a Quote' or 'Request a Sample' buttons on our product page, or contact our sales team directly.
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