Polystyrene - Materials / Alfa Chemistry

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Polystyrene

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Catalog Number

ACMA00017151

Product Name

Polystyrene

Category

Polymers

Description

Insoluble in water and less dense than water. Contact may cause irritate skin, eyes, and mucous membranes. May be toxic by ingestion.;Styrene monomer, stabilized appears as a clear colorless to dark liquid with an aromatic odor. Vapors heavier than air and irritating to the eyes and mucous membranes. Subject to polymerization. If the polymerization takes place inside a closed container, the container may rupture violently. Less dense than water and insoluble in water. Used to make plastics, paints, and synthetic rubber.;GasVapor; Liquid; PelletsLargeCrystals; PelletsLargeCrystals, Liquid;Liquid;Liquid;COLOURLESS-TO-YELLOW OILY LIQUID.;COLOURLESS SOLID IN VARIOUS FORMS.;Colorless to yellow, oily liquid with a sweet, floral odor.;Colorless to yellow, oily liquid with a sweet, floral odor.

IUPAC Name

styrene

Molecular Weight

104.15g/mol

Molecular Formula

C8H8;C6H5CHCH2;(C8H8)x;C8H8

Canonical SMILES

C=CC1=CC=CC=C1

InChI

InChI=1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2

InChI Key

PPBRXRYQALVLMV-UHFFFAOYSA-N

Boiling Point

293 to 295 °F at 760 mm Hg (NTP, 1992);145.0 °C;145.3 °C;145 °C;293°F;293°F

Melting Point

464 °F (NTP, 1992);-24 to -23 °F (NTP, 1992);-31.0 °C;Mp -33 °;-30.65 °C;-33°C;-30.6 °C;240 °C;-23°F;-23°F

Flash Point

88 °F (NTP, 1992);32.0 °C (89.6 °F) - closed cup;88 °F (31 °C) - closed cup;34.4 °C (Tag closed cup); 36.7 °C (Tag open cup).;31 °C c.c.;345-360 °C;88°F;88°F

Density

1.04 to 1.65 at 68 °F (NTP, 1992);0.906 at 68 °F (USCG, 1999);d20 0.91;0.9016 g/cu cm at 25 °C;Relative density (water = 1): 0.91;Relative density (water = 1): 1.04-1.13;0.91;0.91

Solubility

less than 1 mg/mL at 66° F (NTP, 1992);0.00 M;0.31 mg/mL at 25 °C;In water, 300 mg/L at 25 °C;Insoluble in water;Soluble in ethanol, ether, and acetone; miscible with benzene; slightly soluble in carbon tetrachloride;Soluble in carbon disulfide, alcohol, ether, methanol, acetone;Miscible with benzene;Soluble in ... toluene, ethanol, n-heptane, carbon tetrachloride ...;0.31 mg/mL at 25 °C;Solubility in water, g/100ml at 20 °C: 0.03;0.03%

Color/Form

Colorless to yellowish, oily liquid;Viscous liquid

Complexity

68.1

Corrosivity

Styrene will corrode copper and copper alloys

Covalently-Bonded Unit Count

EC Number

202-851-5;500-008-9;614-500-7;619-344-3

Exact Mass

104.0626g/mol

Formal Charge

Heat of Vaporization

10.50 kcal/mol at 25 °C

Heavy Atom Count

ICSC Number

0073;1043

Log P

2.95 (LogP);2.95;log Kow = 2.95;2.95;3.0

MeSH Entry Terms

Monomer, Styrene;Styrene;Styrene Monomer;Styrol;Vinylbenzene

Monoisotopic Mass

104.0626g/mol

NSC Number

62785

Odor

Characteristic, sweet, balsamic, almost floral odor that is extremely penetrating;Aromatic odor;Sweet, floral odor;If pure, sweet and pleasant, but usually contains aldehydes that have a typical penetrating smell, sharp, sweet, and unpleasant.

Other Experimental

Percent in saturated air at 760 mm Hg & 15 °C: 0.57; density of saturated vapor-air mixture at 760 mm Hg & 15 °C: 1.02 (Air = 1);Heat of polymerization: -154 cal/g (-6.35X10+5 J/kg);Styrene dissolves rubber;Latent heat of fusion: 10.95 kJ/mole (at melting point); Latent heat of sublimation: 43.9 kJ/mole (25 °C); Heat of formation: 103.8 kJ/mole (25 °C); Ionization potential: 8.42 eV;When heated to 200 °C it is converted into polymer, polystyrene, which is clear plastic having excellent insulating properties even at ultrahigh radio frequencies.;Enthalpy, 24.83 kcal/mol (liquid), 35.22 kcal/mol (gas); Gibbs (free) energy of formation, 48.37 kcal/mol (liquid), 51.10 kcal/mol (gas); entropy, 56.78 cal/deg/mol (liquid), 82.48 cal/deg/mol (gas); heat capacity, 43.64 cal/deg/mol (liquid), 29.18 cal/deg/mol (gas);Liquid molar volume = 0.115714 cu m/kmol; Heat of formation = 1.4736E+08 J/kmol; Heat of fusion at melting pt = 1.0950E+07 J/kmol;Henry's Law constant = 0.00275 atm cu m/mole at 25 °C;Hydroxyl radical reaction rate constant = 5.8X10-11 cu cm/molecule-sec at 25 °C

Refractive Index

n20D 1.5463;Index of refraction: 1.5440 at 25 °C

Rotatable Bond Count

RTECS Number

WL3675000;WL6475000

Stability

Stable under recommended storage conditions. Test for peroxide formation before distillation or evaporation. Test for peroxide formation or discard after 1 year.;On exposure to light and air it slowly undergoes polymerization and oxidation with formation of peroxides, etc..;It is a storage hazard above 32 °C.;... Styrene is stabilized by a polymerization inhibitor (often tertbutylcatechol). If this is not present in adequate concn, styrene can polymerize and explode its container. The polymerization is also speeded up by temperatures above 66 °C (150 °F).

UNII

44LJ2U959V

UN Number

2211;2055;2055;2055;2055;2055

Vapor Density

3.6 (Air = 1);Relative vapor density (air = 1): 3.6

Vapor Pressure

4.3 mm Hg at 59 °F ; 9.5 mm Hg at 86° F; 10 mm Hg at 95° F (NTP, 1992);6.40 mmHg;6.40 mm Hg at 25 °C;Vapor pressure, kPa at 20 °C: 0.67;5 mmHg;5 mmHg

Viscosity

0.696 cP at 25 °C

XLogP3

2.9