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p-tert-BUTYLTOLUENE ICSC: 1068
April 2007
1-Methyl-4-tert-butylbenzene
4-tert-Butyltoluene
p-TBT
PDF for printing Explanation of fields
CAS No: 98-51-1
RTECS No: XS8400000
UN No: 2667
    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. 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, ventilation.  
 
EXPOSURE      
Inhalation Cough. Sore throat. Metallic taste. Laboured breathing. Nausea. Dizziness. Headache. Tremor. Weakness. 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. Safety spectacles or eye protection in combination with breathing protection. Rinse with plenty of water (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 liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. UN classification
UN Hazard Class: 6.1
UN Pack Group: III
GHS classification
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

Do not transport with food and feedstuffs. Marine pollutant.


EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61S2667 or TEC (R)-61GT1-III 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.

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
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).

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.


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/100 ml at 20°C: (very poor) 0.06
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 that this substance does not enter 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.

IPCS
International
Programme on
Chemical Safety
WHO ILO UNEP EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.

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