Styrene
Styrene (CAS: 100-42-5), a volatile organic compound with the formula C<sub>6</sub>H<sub>5</sub>CH=CH<sub>2</sub> and a molecular weight of 104.15 g/mol, is a key industrial monomer. It is primarily used in the synthesis of polymers like polystyrene, ABS, and SBR. Styrene is also a building block for various organic compounds, serving as a versatile intermediate in chemical manufacturing and research applications.
- IUPAC
- Phenylethylene,Vinylbenzene
- Synonyms
- PhenylethyleneVinylbenzene

Polymer Synthesis
Styrene is the fundamental monomer for producing polystyrene, a widely used plastic. It is also a key component in copolymers such as Acrylonitrile Butadiene Styrene (ABS) and Styrene-Butadiene Rubber (SBR), impacting industries from automotive to packaging.
Chemical Intermediate
As an organic building block, styrene is employed in the synthesis of a variety of chemicals. Its reactive vinyl group allows for diverse chemical transformations, making it valuable in organic synthesis pathways.
Resin Production
Styrene is used in the formulation of unsaturated polyester resins and other specialty resins. These materials find applications in composites, coatings, and adhesives due to their durability and chemical resistance.
| Molecular weight | 104.15 |
|---|---|
| Linear formula | C6H5CH=CH2 |
| Assay | ≥99.0% |
| Boiling point | 145-146 °C(lit.) |
| Density | 0.906 g/mL at 25 °C |
| Refractive index | n20/D 1.546(lit.) |
| Vapour pressure | 12.4 mmHg (37.7 °C)4.3 mmHg (15 °C) |
| Melting point | −31 °C(lit.) |
| Vapour density | 3.6 (vs air) |
| Autoignition temp | 914 °F |
| Contains / stabiliser | 10-15 ppm 4-tert-butylcatechol as inhibitor |


Hazard statements
- H226Flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 32 °C / 89.6 °F |
| Transport (UN / ADR) | UN 2055 3 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-20-36/38 |
| Safety statements (S) | 23 |
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 Styrene used for?
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Styrene is predominantly used as a monomer in the synthesis of polymers like polystyrene, ABS, and SBR. It also serves as a valuable intermediate in various organic chemical synthesis processes.
What are the CAS number and formula for Styrene?
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The CAS number for Styrene is 100-42-5, and its molecular formula is C<sub>6</sub>H<sub>5</sub>CH=CH<sub>2</sub>.
What grade and purity does Tech Serve Solutions supply for Styrene?
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Tech Serve Solutions supplies Styrene with a minimum assay of ≥99.0%. This product is suitable for research and industrial applications. We do not represent this product as USP, BP, or EP grade unless explicitly stated in the product documentation.
How is Styrene safely handled?
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Styrene is a flammable liquid and vapour (H226) and can cause skin (H315) and serious eye irritation (H319), and may cause respiratory irritation (H332). Appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection (type ABEK EN14387), should be used. Ensure adequate ventilation and handle away from ignition sources.
How is Styrene shipped and exported?
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Styrene is classified under UN 2055, Hazard Class 3, Packing Group III. Tech Serve Solutions can facilitate global export of this chemical, adhering to all relevant shipping and regulatory requirements.
How can I request a sample or quote for Styrene?
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To request a sample or a quote for Styrene, please contact our sales team through the website or by phone, providing your specific requirements and delivery details.
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