Styrene

Styrene
Names
	IUPAC name Styrene
	Systematic IUPAC name Ethenylbenzene
	Other names Styrene; Vinylbenzene; Phenylethene; Phenylethylene; Cinnamene; Styrol; Diarex HF 77; Styrolene; Styropol
Identifiers
CAS Number	100-42-5 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1071236
ChEBI	CHEBI:27452 ;
ChEMBL	ChEMBL285235 ;
ChemSpider	7220 ;
ECHA InfoCard	100.002.592
EC Number	202-851-5;
Gmelin Reference	2991
KEGG	C07083 ;
PubChem CID	7501;
RTECS number	WL3675000;
UNII	44LJ2U959V ;
UN number	2055
CompTox Dashboard (EPA)	DTXSID2021284 ;
	InChI InChI=1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2 Key: PPBRXRYQALVLMV-UHFFFAOYSA-N ;
	SMILES c1ccccc1C=C;
Properties
Chemical formula	C8H8
Molar mass	104.15 g/mol
Appearance	colorless oily liquid
Odor	sweet, floral
Density	0.909 g/cm3
Melting point	−30 °C (−22 °F; 243 K)
Boiling point	145 °C (293 °F; 418 K)
Solubility in water	0.03% (20 °C)
log P	2.70
Vapor pressure	5 mmHg (20 °C)
Magnetic susceptibility (χ)	−6.82×10−5 cm3/mol
Refractive index (nD)	1.5469
Viscosity	0.762 cP at 20 °C
Structure
Dipole moment	0.13 D
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	flammable, toxic, probably carcinogenic
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H226, H315, H319, H332, H361, H372
Precautionary statements	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)	2 3 2
Flash point	31 °C (88 °F; 304 K)
Explosive limits	0.9–6.8%
	Lethal dose or concentration (LD, LC):
LC50 (median concentration)	2194 ppm (mouse, 4 h); 5543 ppm (rat, 4 h)
LCLo (lowest published)	10,000 ppm (human, 30 min); 2771 ppm (rat, 4 h)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours)
REL (Recommended)	TWA 50 ppm (215 mg/m3); ST 100 ppm (425 mg/m3)
IDLH (Immediate danger)	700 ppm
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). verify (what is ?) Infobox references

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.

^ ^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.
^ pubchem.ncbi.nlm.nih.gov/compound/7501#section=IUPAC-Name&fullscreen=true
^ ^a ^b ^c ^d ^e ^f ^g NIOSH Pocket Guide to Chemical Hazards. "#0571". National Institute for Occupational Safety and Health (NIOSH).
^ "Styrene". www.chemsrc.com.
^ ^a ^b "Styrene". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
^ "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.

[iupac2013-1] "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] ubchem.ncbi.nlm.nih.gov/compound/7501#section=IUPAC-Name&fullscreen=true

[PGCH-3] ^ ^a ^b ^c ^d ^e ^f ^g NIOSH Pocket Guide to Chemical Hazards. "#0571". National Institute for Occupational Safety and Health (NIOSH).

[chemsrc-4] "Styrene". www.chemsrc.com.

[IDLH-5] "Styrene". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).

[DOE2010-6] "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.

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