- o-Methyl styrene
- o-Vinyl toluene
Colorless liquid with a characteristic odor.
Production of styrene polymers.
Registry Numbers and Inventories.
EC Index Number
Harmful; Dangerous for the Environment
R 20 51/53
S 24 61
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
0.9284 g/cm3 (0 C)
Solubility in water
1.5418 (14.1 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.
Wear positive pressure self-contained breathing apparatus (SCBA).
Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.
The substance may polymerize due to warming with fire or explosion hazard.
Reacts with strong oxidizers and strong acids.
Oxides of carbon.
Upper exp. limit, %
Lower exp. limit, %
Use of water spray when fighting fire may be inefficient. Small Fires: Dry chemical, carbon dioxide, water spray or regular foam. Large Fires: Water spray, fog or regular foam. Do not use straight streams.
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).
Vinyl toluene causes narcosis similar to styrene. Reported to be teratogenic in guinea pigs and fetotoxic in rats.
May cause irritation.
Vapors may cause dizziness or suffocation. May cause toxic effects. May irritate or burn.
May irritate or burn. May cause toxic effects if absorbed through the skin.
Seek medical assistance.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes. Wash skin with soap and water.
In case of contact with substance, immediately flush with running water for at least 20 minutes.