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CNESSTSanté et sécurité du travailEnglishPreventionRépertoire toxicologiqueFiche Resumé
CAS Number : 100-42-5
Styrene is a colorless to yellowish oily viscous liquid. Its aromatic odor, almost floral at low concentrations, becomes penetrating and unpleasant at higher concentrations.
According to the Regulation respecting occupational health and safety
Time-weighted average exposure value (TWAEV): 50 ppm (213 mg/m3)
Short-term exposure value (STEV): 100 ppm (426 mg/m3)
Designation and remarks:
InhalationIn case of vapor inhalation, move the person to fresh air. If breathing has stopped, administer artificial respiration. Consult a physician.
Eye contactRinse the eyes with plenty of water for 15 to 20 minutes. If irritation persists, consult a physician.
Skin contactRemove contaminated clothes promptly. Rinse the skin with soap and water.
IngestionRinse mouth. Do not induce vomiting. Consult a physician.
Fire fighting and special procedures
Use the following extinguishing media: carbon dioxide (CO2), foam, dry chemical powder, water spray. Do not use straight water streams. Use water spray to keep fire-exposed containers cool and prevent explosive polymerization.
Wear a self-contained breathing apparatus and full protective clothing. Move containers from fire, if this can be done without risk.
Carbon monoxide and carbon dioxide.
Exposure in the workplace occurs mainly by inhalation of vapors.
Effects of short-term exposure
Skin and eye contactThis product causes moderate irritation of the eyes and slight irritation of the skin.
Vapor inhalationInhalation of vapors may cause irritation of the eyes and respiratory tract. Inhalation of a high concentration of vapors may cause central nervous system depression (headache, nausea, vomiting, drowsiness, weakness and difficulties in concentration).
Effects of repeated or prolonged exposure
Skin contactThis product has a defatting action on the skin, resulting in redness, desquamation and cracking.
Vapor inhalationInhalation of a high concentration may cause central nervous system depression (headache, nausea, dizziness, loss of appetite and general weakness). In rare cases, styrene may cause asthma.
CancerStyrene is possibly carcinogenic to humans.
Wear a chemical cartridge respirator with organic vapor cartridge(s), if the concentration in the workplace is greater than the TWAEV (50 ppm or 213 mg/m³) or the STEV (100 ppm or 426 mg/m³).
Recommended gloves: polyethylene/ethylene vinyl alcohol /polyethylene (PE/EVAL/PE), polyvinyl alcohol (PVAL) or Viton®.
Wear safety glasses if there is any splash risk.
This product is highly flammable. Flowing and shaking liquid can cumulate electrostastic discharges: equipment must be grounded. Use away from heat and ignition sources. Use non-sparking tools. Do not eat or drink when using this product. Avoid all contact with skin and with eyes.
Store away from heat and ignition sources, in a clearly identified tightly closed container, away from oxidizers, other incompatible material and light, in a cool, dry and well ventilated area. Container must be grounded.
Leak or spill
Eliminate all ignition sources from the area. Absorb or cover with dry earth, sand or other non combustible absorbing material. Keep in a tightly closed container that is clearly identified
Do not dispose of liquid in sewers and of used absorbing material in trash. If necessary, consult the regional office of the Ministry of the Environment.