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Product Name: Vinyltoluene Isomer Mixture, Stabilized
Chemical Family: Aromatic hydrocarbons
SYNONYMS: Methylstyrene, Vinylmethylbenzene
Chemical Formula: C9H10
Intended Use: Used in plastics, resins, coatings, and adhesives industries
Manufacturer: Commercial chemical supplier
Emergency Telephone Number: CHEMTREC: 1-800-424-9300
CAS Number: 25013-15-4
Contact for MSDS: Safety and Compliance Division of the manufacturer
GHS Classification: Flammable Liquids (Category 3), Skin Irritation (Category 2), Eye Irritation (Category 2A), Specific Target Organ Toxicity (Single Exposure, Category 3)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Causes skin and eye irritation. May cause respiratory irritation or drowsiness and dizziness.
Label Elements: Flame, Exclamation Mark pictograms
Precautionary Statements: Keep away from heat/sparks/open flames. Avoid breathing vapors. Use only outdoors or in a well-ventilated area. Wear protective gloves and eyewear.
PPE Required: Chemical-resistant gloves, safety glasses, flame-resistant clothing
Routes of Exposure: Inhalation, skin, eye contact
Chronic Effects: Possible central nervous system effects from repeated exposure
Chemical Name: Vinyltoluene Isomer Mixture
CAS Number: 25013-15-4
Concentration: 98–100%
Stabilizer: Contains trace inhibitors (often up to 0.01% tertiary butylcatechol)
Other Components: No significant non-hazardous components
Inhalation: Move affected person to fresh air. Seek medical attention if symptoms like headache, dizziness, or nausea persist. Oxygen or artificial respiration if breathing is difficult.
Skin Contact: Remove contaminated clothing. Immediately wash skin with soap and plenty of water. If irritation continues, contact a physician.
Eye Contact: Rinse eyes with water for at least 15 minutes, lifting eyelids. Remove contact lenses if present and easy to do. Get medical help if irritation persists.
Ingestion: Rinse mouth with water. Do not induce vomiting. Get immediate medical attention. Never try to give anything by mouth to an unconscious person.
Notes to Physician: Treat symptomatically. Monitor for respiratory distress.
Suitable Extinguishing Media: Foam, carbon dioxide, dry chemical, or water fog
Unsuitable Media: Direct water stream may spread fire
Fire Hazards: Vapors can form explosive mixtures with air. Containers may explode when heated.
Protective Equipment: Wear full protective gear and self-contained breathing apparatus.
Special Procedures: Remove containers from fire area if this can be done without risk. Cool exposed containers with water spray.
Combustion Products: Carbon monoxide, carbon dioxide, and possibly irritating or toxic gases
Flash Point: 46–54°C (115–129°F)
Explosion Limits: Upper 7.0%, Lower 1.1% (by volume in air)
Personal Precautions: Evacuate area. Eliminate ignition sources. Use personal protective equipment. Prevent inhalation and skin contact.
Environmental Precautions: Prevent entry into drains, sewers, or waterways. Report releases as required by local, state, or federal law.
Spill Cleanup Methods: Absorb with inert material like sand or earth. Collect in containers for disposal. Provide adequate ventilation. Use nonsparking tools and explosion-proof equipment.
Disposal: Dispose according to regulatory guidelines. Flush spill area with water after clean-up.
Handling: Handle in a chemical fume hood or with local exhaust. Use only non-sparking tools. Ground/bond containers and equipment. Avoid contact with skin and eyes. Do not breathe vapors or mist.
Storage: Store in a cool, dry, well-ventilated place away from heat, sparks, or open flames. Store in tightly closed, properly labeled containers. Keep away from strong oxidizers, acids, and bases. Maintain temperature below 30°C to avoid polymerization.
Special Precautions: Inhibitor required to prevent polymerization. Exclude air (oxygen) as recommended by supplier.
Occupational Exposure Limits: OSHA PEL: 50 ppm (221 mg/m³) (as Toluene), ACGIH TLV: 50 ppm TWA
Engineering Controls: Local exhaust ventilation, general ventilation. Eye wash stations and safety showers available in immediate area.
Personal Protection: Nitrile gloves, safety goggles, flame retardant protective clothing. For large spills or inadequate ventilation, use NIOSH-approved organic vapor respirator.
Hygiene Measures: Remove contaminated clothing immediately. Wash hands thoroughly before eating, smoking, or leaving the work area.
Appearance: Clear, colorless to light yellow liquid
Odor: Aromatic, similar to styrene or toluene
Odor Threshold: Not established
pH: Not applicable
Boiling Point: 162–172°C (324–342°F)
Melting Point: -40°C (-40°F)
Flash Point: 46–54°C (115–129°F)
Evaporation Rate: Slower than ether
Flammability: Flammable liquid
Explosive Limits: 1.1–7.0% (v/v in air)
Vapor Pressure: 1.6 mmHg at 20°C
Vapor Density: 4.5 (Air = 1)
Relative Density: 0.89–0.91 g/cm³
Solubility: Insoluble in water; soluble in organic solvents
Partition Coefficient (n-octanol/water): 3.44–3.67
Auto-Ignition Temperature: 482°C (900°F)
Decomposition Temperature: Not determined
Viscosity: ~1.0 cP at 25°C
Chemical Stability: Stable under recommended storage conditions with added inhibitor
Hazardous Reactions: Polymerization possible if not stabilized or on contact with strong acids, peroxides, or elevated temperatures
Incompatible Materials: Strong oxidizing agents, acids, peroxides, aluminum, iron
Decomposition Products: Emits carbon oxides under fire or thermal decomposition
Conditions to Avoid: Excessive heat, open flames, sparks, lack of inhibitor, poor ventilation
Polymerization: Can occur with loss of inhibitor or exposure to high temperatures
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: LD50 (oral, rat): 6,800 mg/kg; LC50 (inhalation, rat, 4h): 3,950 ppm
Skin Corrosion/Irritation: Moderate irritation possible
Eye Damage/Irritation: Moderate irritation possible
Respiratory Sensitization: Vapors can cause headaches, dizziness, nausea, central nervous system effects
Developmental Effects: Not classified as reproductive toxicant, but long term exposure not recommended
Carcinogenicity: Not listed as human carcinogen by IARC, NTP, or OSHA
Chronic Effects: CNS depression possible with repeated or high dose exposure
Ecotoxicity: Toxic to aquatic organisms. LC50 (fish, 96 hr): 21 mg/L.
Persistence and Degradability: Moderately persistent in aquatic and soil environments. Expected to degrade slowly under aerobic conditions.
Bioaccumulation: Potential for accumulation in aquatic organisms based on log Kow values.
Mobility in Soil: Low to moderate volatility; may partition into air and soil. Low water solubility increases mobility in soil and groundwater.
Other Hazards: Spills can create slick surfaces. Volatile vapors may travel to ignition sources.
Waste Disposal Method: Dispose of in accordance with federal, state, and local environmental control regulations. Use authorized chemical waste contractor.
Contaminated Packaging: Empty containers may retain residue and vapors, handle as hazardous waste. Do not reuse containers for other materials.
Landfill/Incineration: Appropriate for chemical incineration with afterburner and scrubber or regulated landfill if permitted by authorities.
Sewage Disposal: Do not discharge to sewage systems or water bodies.
UN Number: UN 2618
Proper Shipping Name: Vinyltoluene, Stabilized
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Label Required: Flammable liquid label
Marine Pollutant: No
Hazardous Material Shipping Description: Vinyltoluene, Stabilized, 3, UN2618, PG III
Special Transport Precautions: Keep containers tightly closed. Secure cargo to prevent movement and leaks.
US Federal Regulations: Listed on TSCA Inventory. Subject to SARA 311/312 (Hazard categories: Fire hazard, Acute health hazard). SARA 313 reportable if above threshold.
OSHA Status: Hazardous chemical per 29 CFR 1910.1200
EU Regulations: EC Inventory: Listed. CLP Regulation applies. REACH registered.
Canada: DSL/NDSL: Listed.
California Prop 65: Not listed
Other National Regulations: Follow workplace safety and environmental requirements in jurisdiction of use.
Labeling Requirements: Proper classification and risk phrases. PPE and hazard warnings must be visible.
