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p-tert-BUTYLTOLUENE
ICSC: 1068
Peer-Review Status: 20.04.2007 Validated
1-Methyl-4-tert-butylbenzene
4-tert-Butyltoluene
p-TBT 
CAS #: 98-51-1 RTECS #: XS8400000
UN #: 2667
EINECS #: 202-675-9
 		    Formula: C11H16/ CH3C6H4C(CH3)3
Molecular mass: 148.3

TYPES OF
HAZARD /
EXPOSURE 		ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  Use water spray, alcohol-resistant foam, dry powder, carbon dioxide. 
EXPLOSION Above 63°C explosive vapour/air mixtures may be formed.  Above 63°C use a closed system and ventilation.   
 
EXPOSURE      
Inhalation Cough. Sore throat. Metallic taste. Laboured breathing. Nausea. Dizziness. Headache. Tremor. Weakness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer immediately for medical attention. 
Skin Redness.  Protective gloves.  Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). 
Ingestion Confusion. Convulsions. See Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Personal protection: self-contained breathing apparatus. Do NOT let this chemical enter the environment. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs.
Marine pollutant. 
EC Classification
 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 
GHS Classification
Signal: Danger
Combustible liquid
Harmful if swallowed
Fatal if inhaled
Causes eye irritation
May cause damage to central nervous system through prolonged or repeated exposure if if inhaled
May cause respiratory irritation
Toxic to aquatic life 
skull;toxiccancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61S2667 or TEC (R)-61GT1-III.  Separated from food and feedstuffs and 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. 

IMPORTANT DATA
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
Decomposes on burning. This produces toxic fumes. Reacts with strong oxidants. This generates fire and explosion hazard. 

Occupational exposure limits
TLV: 1ppm as TWA; (ACGIH 2006). 

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 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. This may result in tissue lesions. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at 101.3kPa: 193°C
Melting point: -62.5°C
Relative density (water = 1): 0.86
Solubility in water, g/100ml at 20°C: 0.06 (very poor)
Vapour pressure, Pa at 20°C: 80
Relative vapour density (air = 1): 5.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: 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   		The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur in aquatic organisms. It is strongly advised not to let the chemical enter into the environment. 

NOTES
The odour warning when the exposure limit value is exceeded is insufficient.
Card has been partially updated in January 2008: see GHS classification. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety 		WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
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    See Also:
       Toxicological Abbreviations