1-Methyl-4-tert-butylbenzene
4-tert-Butyltoluene
p-TBT
C11H16/ CH3C6H4C(CH3)3
Molecular mass: 148.3
ICSC # 1068
CAS # 98-51-1
RTECS # XS8400000
UN # 2667
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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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Combustible.
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NO open flames.
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Water spray,
alcohol-resistant foam,
dry powder,
carbon dioxide.
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Explosion
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Above 63°C explosive vapour/air mixtures may be formed.
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Above 63°C use a closed system, ventilation.
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Exposure
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•Inhalation
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Cough.
Sore throat.
Metallic taste.
Laboured breathing.
Nausea.
Dizziness.
Headache.
Tremor.
Weakness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Half-upright position.
Refer immediately for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety spectacles
or
eye protection in combination with breathing protection.
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Rinse with plenty of water (remove contact lenses if easily possible).
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•Ingestion
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Confusion.
Convulsions.
( See Inhalation).
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give one or two glasses of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection: self-contained breathing apparatus.
Do NOT let this chemical enter the environment.
Ventilation.
Collect leaking liquid in sealable containers.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
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Separated from food and feedstuffs, strong oxidants.
Well closed.
Keep in a well-ventilated room.
Store in an area without drain or sewer access.
Provision to contain effluent from fire extinguishing.
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Do not transport with food and feedstuffs.
Marine pollutant.
UN Hazard Class: 6.1
UN Packing Group: III
Signal: Danger
Skull-Health haz
Combustible liquid
Harmful if swallowed
Fatal if inhaled
Causes eye irritation
May cause damage to CNS through prolonged or repeated exposure if inhaled
May cause respiratory irritation
Toxic to aquatic life
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Important Data
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Physical State; Appearance:
COLOURLESS TO YELLOW LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
As a result of flow, agitation, etc., electrostatic charges can be generated.
Chemical Dangers:
The substance decomposes
on burning
producing
toxic fumes.
Reacts with strong oxidants causing fire and explosion hazard.
Occupational Exposure Limits:
TLV: 1 ppm (as TWA). (ACGIH 2006)
MAK: IIb (not established but data is available). (DFG 2006).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation
and
by ingestion.
Inhalation Risk:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance is irritating to the eyes and the respiratory tract.
Exposure far above the OEL could cause lowering of consciousness.
Effects of Long-Term or Repeated Exposure:
The substance may have effects on the central nervous system, resulting in tissue lesions.
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Physical
Properties
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Boiling point at 101.3kPa: 193°C
Melting point: -62.5°C
Relative density (water = 1): 0.86
Solubility in water, g/100 ml at 20°C: (very poor) 0.06
Vapour pressure, Pa at 20°C: 80
Relative vapour density (air = 1): 5.1
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flashpoint: 63°C c.c.
Auto-ignition temperature: 510°C
Explosive limits, vol% in air: 0.7-7.1
Octanol/water partition coefficient as log Pow: 4.35
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Environmental
Data
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The substance is toxic to aquatic organisms.
Bioaccumulation of this chemical may occur in aquatic organisms.
It is strongly advised that this substance does not enter the environment.
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N O T E S
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The odour warning when the exposure limit value is exceeded is insufficient.
Transport Emergency Card: TEC (R)-61S2667 or TEC (R)-61GT1-III
Card has been partially updated in January 2008: see GHS classification.
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ADDITIONAL INFORMATION
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ICSC: 1068
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p-tert-BUTYLTOLUENE
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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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