Ethylbenzene

Ethylbenzene
Identifiers
CAS number 100-41-4 Y
PubChem 7500
ChemSpider 7219 Y
UNII L5I45M5G0O Y
DrugBank DB01722
KEGG C07111 Y
ChEBI CHEBI:16101 Y
ChEMBL CHEMBL371561 Y
RTECS number DA0700000
Jmol-3D images Image 1
Properties
Molecular formula C8H10
Molar mass 106.17 g mol−1
Appearance Clear, colorless liquid
Density 0.8665 g/mL
Melting point

-95 °C, 178 K, -139 °F

Boiling point

136 °C, 409 K, 277 °F

Solubility in water 0.015 g/100 mL (20 °C)
Viscosity 0.669 cP at 20 °C
Hazards
R-phrases R11 R20
S-phrases (S2) S16 S24/25 S29
Main hazards Flammable
NFPA 704
3
2
0
Flash point 15-20 °C
Related compounds
Related aromatic
hydrocarbons
styrene, toluene
Related compounds benzene
polystyrene
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ethylbenzene is an organic compound with the formula C6H5CH2CH3. This aromatic hydrocarbon is important in the petrochemical industry as an intermediate in the production of styrene, which in turn is used for making polystyrene, a common plastic material.

Contents

Production

Although often present in small amounts in crude oil, ethylbenzene is produced in bulk quantities by combining benzene and ethylene in an acid-catalyzed chemical reaction:

C6H6 + C2H4C6H5CH2CH3

Approximately 24,700,000 tons were produced in 1999.[1] Catalytic dehydrogenation of the ethylbenzene then gives hydrogen and styrene:

C6H5CH2CH3 → C6H5CH=CH2 + H2

Other uses

Ethylbenzene has been used as a solvent for aluminium bromide in the anhydrous electrodeposition of aluminium. Ethylbenzene is also an ingredient in some paints, and solvent grade xylene (xylol) is nearly always contaminated with a few percent of ethylbenzene.

References

  1. ^ Vincent A.Welch, Kevin J. Fallon, Heinz-Peter Gelbke “Ethylbenzene” Ullmann’s Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2005. doi:10.1002/14356007.a10_035.pub2

External links