Isopropenyl benzene
2-Phenylpropene
1-Methyl-1-phenylethylene
C9H10 / C6H5C(CH3)=CH2
Molecular mass: 118.2
ICSC # 0732
CAS # 98-83-9
RTECS # WL5075300
UN # 2303
EC # 601-027-00-6
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Flammable.
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NO open flames, NO sparks, and NO smoking.
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Water spray, foam, powder, carbon dioxide.
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Explosion
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Above 54°C explosive vapour/air mixtures may be formed.
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Above 54°C use a closed system, ventilation, and explosion-proof electrical equipment.
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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PREVENT GENERATION OF MISTS!
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•Inhalation
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Cough.
Dizziness.
Sore throat.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Causes watering of the eyes.
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Safety spectacles
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Rinse mouth.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection:
filter respirator for organic gases and vapours.
Do NOT let this chemical enter the environment.
Ventilation.
Collect leaking and spilled liquid in sealable non-metallic containers as far as possible.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
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Store only if stabilized.
Store in an area without drain or sewer access.
Fireproof.
Well closed.
Separated from
strong oxidants.
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Marine pollutant.
Xi symbol
N symbol
R: 10-36/37-51/53
S: 2-61
UN Hazard Class: 3
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS
LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Chemical Dangers:
The substance may polymerize.
The substance decomposes
on burning
producing
toxic fumes
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Reacts with strong oxidants.
Attacks aluminium and copper.
Occupational Exposure Limits:
TLV: 50 ppm as TWA, 100 ppm as STEL; (ACGIH 2005).
MAK: 50 ppm, 250 mg/m3
Peak limitation category: I(2);) Pregnancy risk group: D;
(DFG 2005).
OSHA PEL: C 100 ppm (480 mg/m3)
NIOSH REL: TWA 50 ppm (240 mg/m3) ST 100 ppm (485 mg/m3)
NIOSH IDLH: 700 ppm See: 98839
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation.
Inhalation Risk:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C; on spraying or dispersing, however, much faster.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
the skin
and
the respiratory tract
.
Lachrymation.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact with skin may cause dermatitis.
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Physical
Properties
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Boiling point: 164°C
Melting point: -23°C
Relative density (water = 1): 0.91
Solubility in water, g/100 ml at 20°C: 0.012
(very poor)
Vapour pressure, Pa at 20°C: 300
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Relative vapour density (air = 1): 4.08
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 54°C
Auto-ignition temperature: 574°C
Explosive limits, vol% in air: 0.9-6.6
Octanol/water partition coefficient as log Pow: 3.38
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Environmental
Data
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The substance is harmful to aquatic organisms.
The substance may cause long-term effects in the aquatic environment.
Bioaccumulation of this chemical may occur in fish.
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N O T E S
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Transport Emergency Card: TEC (R)-30S2303 or 30GF1-III
NFPA Code: H1; F2; R1;
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ADDITIONAL INFORMATION
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ICSC: 0732
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alpha-METHYL STYRENE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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