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Styrene

  • Styrene
  • Styrene
  • Styrene

Styrene

Styrene
CAS No.: 100-42-5
Molecular Formula:C8H8
Molecular Weight: 104.14912

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PRODUCT DESCRIPTION

Styrene is an organic compound with the chemical formula C8H8; its structure comprises a benzene ring and a vinyl group. Also known as vinylbenzene or cinnamene (CAS No. 100-42-5), it is a colorless, transparent, and flammable liquid at room temperature. It has a density of 0.906 g/cm³, is insoluble in water but soluble in most organic solvents (such as ethanol and diethyl ether), and serves as an important monomer for the production of synthetic resins, ion-exchange resins, and synthetic rubber.


Chemical Properties

English NameStyrene / Ethenylbenzene
AliasVinylbenzene
Chemical FormulaC₈H₈
Molecular Weight104.15 g/mol
CAS Number100-42-5
EINECS Number202-851-5
Melting Point-31.5 °C
Boiling Point145.2 °C
Water Solubility0.3 g/L
Density0.906 g/cm³
AppearanceColorless transparent oily liquid
Flash Point31.1 °C
ApplicationsUsed for manufacturing polystyrene, synthetic rubber, ion exchange resins, etc.
Safety SymbolsS7; S16; S23; S26; S36/37; S45
Hazard SymbolsXn (Harmful)
Hazard StatementsR10; R20; R36/38
UN Dangerous Goods Number2055
Refractive Index1.546 (at 20°C)
Saturated Vapor Pressure0.7 kPa (at 20°C)
Critical Temperature369 °C
Critical Pressure3.81 MPa
Ignition Temperature490 °C
Upper Explosive Limit8.0%
Lower Explosive Limit1.1%
SolubilityInsoluble in water; soluble in ethanol, ether and most organic solvents
Viscosity0.696 mPa·s (at 25°C)
Heat of Vaporization (25°C)43.96 kJ/mol
Heat of Fusion10.95 kJ/mol
Heat of Formation147.46 kJ/mol (gas, 25°C); 103.96 kJ/mol (liquid, 25°C)


Product Usage

Polymer Industry: In the polymer industry, styrene serves as a crucial monomer for synthesizing target polymers, the most common of which is polystyrene (PS). Polystyrene is a widely used plastic characterized by high transparency, excellent mechanical properties, and strong chemical resistance; it finds extensive application in areas such as food packaging, electrical appliance housings, and toys. Additionally, styrene is used to synthesize other copolymers, such as acrylonitrile-styrene copolymer (SAN copolymer).

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