Styrene

Styrene
Styrene
Names
IUPAC name
Styrene[2]
Systematic IUPAC name
Ethenylbenzene[1]
Other names
Styrene[1]
Vinylbenzene
Phenylethene
Phenylethylene
Cinnamene
Styrol
Diarex HF 77
Styrolene
Styropol
Identifiers
3D model (JSmol)
1071236
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.002.592 Edit this at Wikidata
EC Number
  • 202-851-5
2991
KEGG
RTECS number
  • WL3675000
UNII
UN number 2055
  • InChI=1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2 checkY
    Key: PPBRXRYQALVLMV-UHFFFAOYSA-N checkY
  • c1ccccc1C=C
Properties
C8H8
Molar mass 104.15 g/mol
Appearance colorless oily liquid
Odor sweet, floral[3]
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)[3]
log P 2.70[4]
Vapor pressure 5 mmHg (20 °C)[3]
−6.82×10−5 cm3/mol
1.5469
Viscosity 0.762 cP at 20 °C
Structure
0.13 D
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 flammable, toxic, probably carcinogenic
GHS labelling:
GHS02: FlammableGHS07: Exclamation markGHS08: Health hazard
Danger
H226, H315, H319, H332, H361, H372
P201, P202, P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P280, P281, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P308+P313, P312, P314, P321, P332+P313, P337+P313, P362, P370+P378, P403+P235, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
2
3
2
Flash point 31 °C (88 °F; 304 K)
Explosive limits 0.9–6.8%[3]
Lethal dose or concentration (LD, LC):
2194 ppm (mouse, 4 h)
5543 ppm (rat, 4 h)[5]
10,000 ppm (human, 30 min)
2771 ppm (rat, 4 h)[5]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours)[3]
REL (Recommended)
 TWA 50 ppm (215 mg/m3)
ST 100 ppm (425 mg/m3)[3]
IDLH (Immediate danger)
 700 ppm[3]
Safety data sheet (SDS) MSDS
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).
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Styrene is an organic compound with the chemical formula C6H5CH=CH2. Its structure consists of a vinyl group as substituent on benzene. Styrene 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.[vague] Styrene is the precursor to polystyrene and several copolymers, and is typically made from benzene for this purpose. Approximately 25 million tonnes of styrene were produced in 2010,[6] increasing to around 35 million tonnes by 2018.

  1. ^ a b "Front Matter". Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: Royal Society of Chemistry. 2014. pp. P001–P004. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.
  2. ^ pubchem.ncbi.nlm.nih.gov/compound/7501#section=IUPAC-Name&fullscreen=true
  3. ^ a b c d e f g NIOSH Pocket Guide to Chemical Hazards. "#0571". National Institute for Occupational Safety and Health (NIOSH).
  4. ^ "Styrene". www.chemsrc.com.
  5. ^ a b "Styrene". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  6. ^ "New Process for Producing Styrene Cuts Costs, Saves Energy, and Reduces Greenhouse Gas Emissions" (PDF). US Department of Energy. Archived from the original (PDF) on 21 April 2013.