National Pollutant Inventory

Substances

Ethylbenzene: Overview

Description

Ethylbenzene is used primarily in the production of styrene and synthetic polymers. It is used as a solvent; a constituent of asphalt and naphtha; and in synthetic rubber, fuels, paints, inks, carpet glues, varnishes, tobacco products, and insecticides. It is a component of automotive and aviation fuels. It is also used to make other chemicals, including acetophenone, cellulose acetate, diethyl-benzene, ethyl anthraquinone, ethylbenzene sulfonic acids, propylene oxide, and alpha-methylbenzyl alcohol.

Substance details

Substance name: Ethylbenzene

CASR number: 100-41-4

Molecular formula: C8H10

Synonyms: EB, ethylbenzol, phenylethane, Ethyl Benzene 

Physical properties

Ethylbenzene is a colourless liquid that smells like petrol.

Boiling Point: 136.2°C

Melting Point: 94.97°C

Vapour Density: 3.66

Vapour Pressure: 9.53 mm Hg at 25°C

Specific Gravity: 0.867 at 20°C

Chemical properties

Ethylbenzene is a flammable and combustible liquid. Its vapours are heavier than air and may travel to a source of ignition and flash back. In liquid form, it floats on water and may travel to a source of ignition and spread fire. I ts combustion may produce irritants and toxic gases. Ethylbenzene may accumulate static electricity and will react with oxidising materials. It is miscible with organic solvents and soluble in alcohol and ether. It evaporates at room temperature and burns easily. It moves easily into the air from water and soil and is most commonly found as a vapour in the air.

Further information

The National Pollutant Inventory (NPI) holds data for all sources of ethylbenzene emissions in Australia.

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Factory. Credit: Michael Lindquist