- p-Methyl styrene
- p-Vinyl toluene
Colorless liquid, strong, disagreeable odor.
Use in mixtures with other vinyltoluene isomers (3-vinyltoluene) as monomers for producing poly(vinyltoluene).
Registry Numbers and Inventories.
R 10 20 36/37/38
S 26 36
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
2382 ppm (0.2%) at 25 C (calculated)
0.9383 g/cm3 (0 C)
Solubility in water
0.0020986 pa-s @ 239.02 K
0.043227 newtons/m @ 239.02 K
1.5393 (25 C)
Partition coefficient, pKow
Heat of vaporization
Heat of combustion
Hazards and Protection.
Outside or detached storage is preferred. Store in a cool, dry, well-ventilated location. Store away from heat, oxidizing materials, and sunlight. Separate from acids, oxidizing materials, peroxides, and metal salts.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Any supplied-air respirator with a full facepiece and operated in a pressure-demand or other positive pressure mode.<BR> For emergency or planned entry in unknown concentrations or IDLH conditions, use any self-contained breathing apparatus with a full facepiece and operated in a pressure-demand or other positive pressure mode.
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Apply universal gelling agent to immobilize spill. Apply approriate foam to diminish vapor and fire hazard. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Use surface active agent (e.g. detergent, soaps, alcohols), if approved by epa. Inject universal gelling agent to solidify encircled spill and increase effectiveness of booms.
The substance may polymerize due to warming with fire or explosion hazard.
May react vigorously with strong oxidizing agents May react exothermically with reducing agents to release hydrogen gas.
Oxides of carbon.
Upper exp. limit, %
Lower exp. limit, %
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may spread fire. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Fire will produce irritating, corrosive and/or toxic gases.
TLV: 50 ppm; 242 mg/m3 (as TWA); 100 ppm; 483 mg/m3 (as STEL) (ACGIH 1996).
Central nervous system depression occurs in serious exposures.
Styrene sickness with nausea, vomiting, and a sensation of drunkenness occurs with inhalation exposure.
Irritation of the respiratory tract and occupational asthma may occur. Pulmonary edema has been reported in animals.
May irritate or burn. May cause toxic effects if absorbed through the skin.
Do not induce emesis - dilution: following ingestion and/or prior to gastric evacuation, immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 15 ml/kg in a child). The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation.
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. A thorough ophthalmic examination should be done if visual symptoms are present.