Styrene Monomer

Styrene Monomer

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Description

Styrene Monomer, also known as ethenylbenzenevinylbenzene, and phenylethene, is an organic compound with the chemical formula C6H5CH=CH2. This derivative of benzene is a colorless oily liquid that evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor. Styrene Monomer is the precursor to polystyrene and several copolymers.

Specifications

Names
Preferred IUPAC namePhenylethene
Other namesVinyl benzene; cinnamene; styrol; phenylethene; diarex HF 77; styrolene; styropol; vinylbenzene; phenylethylene
Identifiers
CAS Number 100-42-5
ChEBI CHEBI:27452
ChEMBL ChEMBL285235
ChemSpider 7220
Jmol interactive 3D
KEGG
PubChem 7501
RTECS number WL3675000
UNII 44LJ2U959V
InChI
SMILES
Properties of Styrene Monomer
Chemical formula C8H8
Molar mass 104.15 g/mol
Appearance colorless oily liquid
Odor sweet, floral[1]
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)[1]
Vapor pressure 5 mmHg (20°C)[1]
Refractive index(nD) 1.5469
Viscosity 0.762 cP at 20 °C
Structure
Dipole moment 0.13 D
Hazards
Main hazards flammable, toxic
Safety data sheet
R-phrases R10 R36
S-phrases S38 S20 S23
NFPA 704 322
Flash point 31 °C (88 °F; 304 K)
Explosive limits 0.9%-6.8%[1]
Lethal dose or concentration (LDLC):
LC50 (Median concentration) 2194 ppm (mouse, 4 hr)
5543 ppm (rat, 4 hr)[2]
LCLo (Lowest published) 10,000 ppm (human, 30 min)
2771 ppm (rat, 4 hr)[2]
US health exposure limits (NIOSH):
PEL (Permissible) TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours)[1]
REL (Recommended) TWA 50 ppm (215 mg/m3) ST 100 ppm (425 mg/m3)[1]
IDLH (Immediate danger 700 ppm[1]
Related compounds
Related styrenes;
related aromaticcompounds
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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