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STYRENE ICSC: 0073
Date of peer-review: April 1994

Vinylbenzene
Phenylethylene
Ethenylbenzene
CAS # 100-42-5 C8H8 / C6H5CH=CH2
RTECS # WL3675000 Molecular mass: 104.1
UN # 2055 (styrene monomer, inhibited)
EC # 601-026-00-0
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Powder, AFFF, foam, carbon dioxide.
EXPLOSION Above 31C explosive vapour/air mixtures may be formed. See Notes.
Above 31C use a closed system, ventilation, and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!

Inhalation Dizziness. Drowsiness. Headache. Nausea. Weakness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest.
Skin Redness.
Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain.
Safety goggles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal pain. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Rest.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. (Extra personal protection: self-contained breathing apparatus).
Airtight. Marine pollutant.
EU Classification
Symbol: Xn
R: 10-20-36/38
S: (2-)23
Note: D
UN Classification
UN Hazard Class: 3
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-101 (monomer, inhibited) NFPA Code: H 2; F 3; R 2;
Fireproof. Separated from incompatible materials (see Chemical Dangers). Cool. Keep in the dark. Store only if stabilized.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2001

SEE IMPORTANT INFORMATION ON BACK


STYRENE ICSC: 0073
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO YELLOW, OILY LIQUID.

PHYSICAL DANGERS:
As a result of flow, agitation, etc., electrostatic charges can be generated.

CHEMICAL DANGERS:
The substance can form explosive peroxides. The substance may polymerize due to warming, under the influence of light and on contact with many compounds such as oxygen, oxidizing agents, peroxides and strong acids with fire or explosion hazard. The substance decomposes on burning producing toxic fumes, styrene oxide. Attacks copper and copper alloys.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 50 ppm; 213 mg/m^3 STEL: 100 ppm; 426 mg/m^3 (skin) (ACGIH 1993-1994).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation and through the skin.

INHALATION RISK:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. Swallowing the liquid may cause aspiration into the lungs with the risk of chemical pneumonitis. Exposure could cause lowering of consciousness.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma. The substance may have effects on the central nervous system. This substance is possibly carcinogenic to humans. See Notes.
PHYSICAL PROPERTIES
Boiling point: 145C
Melting point: -30.6C
Relative density (water = 1): 0.9
Solubility in water, g/100 ml at 25C: 0.03
Vapour pressure, kPa at 20C: 0.7
Relative vapour density (air = 1): 3.6
Relative density of the vapour/air-mixture at 20C (air = 1): 1.02
Flash point: 31C c.c.
Auto-ignition temperature: 490C
Explosive limits, vol% in air: 0.9-6.8
Octanol/water partition coefficient as log Pow: 3.2
ENVIRONMENTAL DATA

NOTES
Depending on the degree of exposure, periodic medical examination is indicated. The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. Check for peroxides prior to distillation; eliminate if found. Styrene monomer vapours are uninhibited and may form polymers in vents or flame arresters of storage tanks, resulting in blockage of vents.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2001

See Also:
        Styrene (CHEMINFO)
        Styrene (EHC 26, 1983)
        Styrene (IARC Summary & Evaluation, Volume 60, 1994)
        Styrene (PIM 509)