Overview
Ethylbenzene (CAS 100-41-4 ), commonly abbreviated as EB, is a high-volume aromatic hydrocarbon produced primarily as an intermediate in petrochemical manufacturing. It functions as a solvent and chemical building block across industrial, pharmaceutical, and specialty chemical supply chains.
The dominant industrial use is as a precursor in styrene monomer production, where EB undergoes catalytic dehydrogenation. This makes it a critical procurement target for polymer and resin manufacturers seeking reliable raw material streams.
In solvent applications, it is used in coatings, adhesives, and ink formulations where aromatic solvency and controlled evaporation rate are required. Pharmaceutical manufacturers source EB as a process solvent for active ingredient synthesis and purification steps.
At trace levels, it also appears in flavor and fragrance compounding, where its characteristic aromatic profile contributes to specific formulation targets. This versatility ensures its presence in diverse chemical manufacturing portfolios globally.
Ethylbenzene is supplied as a clear liquid in bulk tanker, ISO container, and drum formats. Standard commercial grades include technical and high-purity specifications, with purity levels typically ranging from 99% to 99.9%+ for demanding synthesis applications.
Buyers in regulated industries may require documentation aligned with pharmaceutical-grade solvent standards such as USP or Ph. Eur. monographs. These quality benchmarks ensure the material meets the rigorous safety and purity requirements of the global market.
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Physical Properties
| Melting Point | -94.9 °C |
| Boiling Point | 136.1 °C |
| Density | 0.8670 g/cm³ @ Temp: 20 °C |
| Flash Point | 72 °F |
| Appearance | Ethylbenzene is a colorless liquid. Pungent aromatic odor. The Odor Threshold is 0.0920.60 ppm |
| Color | Colorless |
| Odor | Aromatic. |
| Form | Liquid |
| Water Solubility | 0.0206 g/100 mL |
| Vapor Pressure | 28.69 psi ( 55 °C) |
| Refractive Index | n 20/D 1.495(lit.) |
| Log P | 3.03-3.6 at 20℃ |
Safety & Handling
Danger GHS02 GHS07 GHS08 GHS09 Hazard Statements H225 Highly Flammable liquid and vapor H303 May be harmful if swallowed H304 May be fatal if swallowed and enters airways H315 Causes skin irritation H316 Causes mild skin irritation H319 Causes serious eye irritation H320 Causes eye irritation H332 Harmful if inhaled H335 May cause respiratory irritation H336 May cause drowsiness or dizziness H351 Suspected of causing cancer H360 May damage fertility or the unborn child H371 May cause damage to organs H372 Causes damage to organs through prolonged or repeated exposure H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H401 Toxic to aquatic life H411 Toxic to aquatic life with long lasting effects H412 Harmful to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P331 Do NOT induce vomiting. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P316 Get emergency medical help immediately. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P308+P316 Get emergency medical help immediately. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P370+P378 Use … for extinction. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P403+P235 Store in a well-ventilated place. Keep cool. P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29026000 |
| UN Number | 1175 |
| ADR Class | 3 |
| Packing Group | II |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 100-41-4
- EC Number
- 202-849-4
- Mol. Weight
- 106.16
- HS Code
- 29026000
- Category
- Catalysts & Catalyst Precursors