Styrene

Styrene
Names
Preferred IUPAC name
Ethenylbenzene[1]
Other names
Styrene[1]
Vinylbenzene
Phenylethene
Phenylethylene
Cinnamene
Styrol
Diarex HF 77
Styrolene
Styropol
Identifiers
  • 100-42-5 Y
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.002.592
KEGG
RTECS number
  • WL3675000
UNII
  • InChI=1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2 Y
    Key: PPBRXRYQALVLMV-UHFFFAOYSA-N Y
  • c1ccccc1C=C
Properties
C8H8
Molar mass 104.15 g/mol
Appearance colorless oily liquid
Odor sweet, floral[2]
Density 0.909 g/cm3
Melting point −30 °C (−22 °F; 243 K)
Boiling point 145 °C (293 °F; 418 K)
0.03% (20 °C)[2]
log P 2.70[3]
Vapor pressure 5 mmHg (20 °C)[2]
−6.82×10−5 cm3/mol
1.5469
Viscosity 0.762 cP at 20 °C
Structure
0.13 D
Hazards
Main hazards flammable, toxic, probably carcinogenic
Safety data sheet MSDS
R-phrases (outdated) R10 R36
S-phrases (outdated) S38 S20 S23
NFPA 704 (fire diamond)
2
3
2
Flash point 31 °C (88 °F; 304 K)
Explosive limits 0.9–6.8%[2]
Lethal dose or concentration (LD, LC):
2194 ppm (mouse, 4 h)
5543 ppm (rat, 4 h)[4]
10,000 ppm (human, 30 min)
2771 ppm (rat, 4 h)[4]
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours)[2]
REL (Recommended)
TWA 50 ppm (215 mg/m3)
ST 100 ppm (425 mg/m3)[2]
IDLH (Immediate danger)
700 ppm[2]
Related compounds
Related styrenes;
related aromatic compounds
polystyrene, stilbene;
ethylbenzene
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Styrene (/ˈstrn/)[5] is an organic compound with the chemical formula C6H5CH=CH2. This derivative of benzene is a colorless oily liquid, although aged samples can appear yellowish. The compound evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor. Styrene is the precursor to polystyrene and several copolymers. Approximately 25 million tonnes of styrene were produced in 2010,[6] increasing to around 35 million tonnes by 2018.