| IUPAC name
| Other names
Diarex HF 77
|Molar mass||104.15 g/mol|
|Density||0.906 g/cm3 (20 °C)|
|Melting point||−30 °C (−22 °F; 243 K)|
|Boiling point||145 °C (293 °F; 418 K)|
|0.05 g/100 ml (25 °C)|
|Solubility||Miscible with acetone, benzene, ethanol, hexane, methanol, toluene|
|Vapor pressure||5 mmHg (20 °C)|
|Safety data sheet||Sigma-Aldrich|
|Flash point||31 °C (88 °F; 304 K)|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|6,000 mg/kg (rat, oral)|
LC50 (Median concentration)
| 2,194 ppm (mouse, 4 hr)|
5,543 ppm (rat, 4 hr)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Styrene, also known as ethenylbenzene, vinylbenzene and phenylethene, is an aromatic organic compound with the chemical formula C6H5CH=CH2.
Upon exposure to light and air, styrene undergoes self-polymerization and oxidation with formation of peroxides.
Styrene is a colorless viscous liquid, with a sweet smell. It is insoluble in water, but miscible with organic solvents.
Styrene is sold by chemical suppliers.
The easiest route to styrene is by cracking of polystyrene. This can be done by heating items made of polystyrene, such as plastic kitchen cutlery or other items, which must be made from polystyrene. Avoid using styrofoam, since you'll have to melt it to solid block, as 98% of it it's air.
Dehydrogenation of ethylbenzene will lead to styrene.
Styrene can be prepared via decarboxylation of cinnamic acid.
Styrene is regarded as a "known carcinogen", especially in case of eye contact, but also in case of skin contact, of ingestion and of inhalation, according to several sources. Styrene is largely metabolized into styrene oxide in humans, resulting from oxidation by cytochrome P450. Styrene oxide is considered toxic, mutagenic, and possibly carcinogenic.
Styrene should be kept in closed bottles, in dark well ventilated places. Tert-butylcatechol is often used as preservative, to inhibit polymerization.
Styrene should be mixed with a more flammable solvent and burned.