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Styrene

Names Preferred IUPAC nameEthenylbenzeneOther names StyreneVinylbenzenePhenylethenePhenylethyleneCinnameneStyrolDiarex HF 77StyroleneStyropolIdentifiers CAS Number100-42-53D model (JSmol)Interactive imageBeilstein Reference1071236 ChEBICHEBI:27452ChEMBLChEMBL285235ChemSpider7220ECHA InfoCard100.002.592EC Number202-851-5Gmelin Reference2991 KEGGC07083PubChemCID7501RTECS numberWL3675000UNII44LJ2U959VUN number2055 CompTox Dashboard(EPA)DTXSID2021284InChIInChI=1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2Key: PPBRXRYQALVLMV-UHFFFAOYSA-NSMILESc1ccccc1C=CProperties Chemical formulaC8H8Molar mass104.15 g/mol Appearance colorless oily liquid Odorsweet and floral Density0.909 g/cm Melting point−30 °C (−22 °F; 243 K) Boiling point145 °C (293 °F; 418 K) Solubility in water0.03% (20 °C) log P2.70 Vapor pressure5 mmHg (20 °C) Magnetic susceptibility (χ)−6.82×10 cm/molRefractive index (nD)1.5469 Viscosity0.762 cP at 20 °C Structure Dipole moment0.13 DHazards Occupational safety and health (OHS/OSH): Main hazardsflammable, toxic, probably carcinogenicGHS labelling: PictogramsSignal wordDangerHazard statementsH226, H315, H319, H332, H361, H372Precautionary statementsP201, P202, P210, P233, P240, P241, P242, P243, P260, 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, P501NFPA 704 (fire diamond) 232Flash point31 °C (88 °F; 304 K) Explosive limits0.9–6.8% 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/m) ST 100 ppm (425 mg/m) IDLH (Immediate danger)700 ppm Safety data sheet (SDS) SDSRelated compounds Related styrenes;related aromatic compoundspolystyrene, stilbene;ethylbenzeneExcept where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Nverify ( ?)

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