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Other Names: Styrene monomer, vinyl benzene, phenylethylene
Formula: C6H5CH: CH2
Sp. Gr.: 0.90
Viscosity: Styrene monomer - thin. If polymerization has taken place, or if the styrene has been mixed with other liquids, viscosity may range up to 100,000 cPs.
Remarks: Styrene is a colorless, oily-like liquid, aromatic odor; freezing point -31°C / -24°F, -b.p. 145°C / 293°F, flash point (open cup) 38°C / 100°F. Insoluble in water, soluble in alcohol and ether; readily polymerizes when heated or exposed to light, becoming increasingly viscous until a clear solid is produced. Inhibitors are mixed with the styrene during shipment to prevent polymerization. Used for making polystyrene plastics, making SBR and ABS resins, and in making protective coatings.
Pump Notes: Cast iron construction is normally satisfactory. Elastomers vary from Viton® to PTFE or Kalrez®. A mechanical shaft seal is frequently used
Kalrez® is a registered trademark of DuPont Dow Elastomers®, L.L.C.