2-Chlorostyrene
2-Chlorostyrene (CAS: 2039-87-4), with the molecular formula H2C=CHC6H4Cl and a molecular weight of 138.59 g/mol, is a halogenated styrene monomer. It is valued for its high refractive index properties, making it a key component in advanced materials science. This compound is primarily utilized in the synthesis of polymers for optical applications, including those found in organic electronics and waveguide technologies, contributing to the development of next-generation photonic devices.

Polymer Synthesis
2-Chlorostyrene serves as a monomer for producing polymers with high refractive indices. These polymers are essential for fabricating components in optical and photonic applications.
Organic and Printed Electronics
The unique electronic and optical properties of polymers derived from 2-chlorostyrene make them suitable for use in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and other printed electronic devices.
Waveguide Materials
This monomer is employed in the creation of materials for optical waveguides, crucial for transmitting light signals in telecommunications and integrated optics.
Photonic and Optical Materials
Its high refractive index makes 2-chlorostyrene an important building block for advanced optical materials, including lenses, coatings, and other components requiring specific light manipulation.
| Molecular weight | 138.59 |
|---|---|
| Linear formula | H2C=CHC6H4Cl |
| Assay | 97% |
| Boiling point | 58-60 °C/7 mmHg(lit.) |
| Density | 1.08 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.565(lit.) |
| Storage temperature | 2-8°C |
| Contains / stabiliser | 0.1% hydroquinone as stabilizer |



Hazard statements
- H226Flammable liquid and vapour
- H332Harmful if inhaled
- H350May cause cancer
Precautionary statements
- P201Obtain special instructions before use
- P308IF exposed or concerned
| 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) | T |
| Risk statements (R) | 45-20/22 |
| Safety statements (S) | 53-23-36/37/39-45 |
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 2-Chlorostyrene primarily used for?
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2-Chlorostyrene is primarily used as a monomer in the synthesis of polymers for high refractive index applications, particularly in organic electronics, photonic materials, and optical waveguides.
What is the CAS number and chemical formula for 2-Chlorostyrene?
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The CAS number for 2-Chlorostyrene is 2039-87-4, and its chemical formula is H2C=CHC6H4Cl.
What grade and purity does Tech Serve Solutions supply for 2-Chlorostyrene?
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Tech Serve Solutions supplies 2-Chlorostyrene with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 2-Chlorostyrene be handled safely?
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2-Chlorostyrene is a flammable liquid and vapour (H226), harmful if inhaled (H332), and may cause cancer (H350). Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area, and keep away from heat and ignition sources.
How is 2-Chlorostyrene packed, shipped, and exported?
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2-Chlorostyrene is stabilised with 0.1% hydroquinone and typically stored at 2-8°C. As a global supplier, Tech Serve Solutions adheres to all relevant regulations for packing, shipping, and exporting chemical compounds, including UN 1993 classification.
How can I request a sample or quote for 2-Chlorostyrene?
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To request a sample or obtain a quote for 2-Chlorostyrene, please contact our sales team through the website or by phone, providing your specific requirements and shipping details.
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