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p-CYMENEICSC: 0617
1-Methyl-4-isopropylbenzene
Dolcymene
Camphogen
November 1997
CAS #: 99-87-6
UN #: 2046
EC Number: 202-796-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Flammable.  Above 47°C explosive vapour/air mixtures may be formed.  NO open flames, NO sparks and NO smoking.  Above 47°C use a closed system, ventilation and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).  Use powder, AFFF, foam, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Dizziness. Drowsiness. Vomiting.  Use ventilation.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
Skin Dry skin. Redness.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Wear protective gloves when administering first aid. 
Eyes Redness.  Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Diarrhoea. Drowsiness. Headache. Nausea. Vomiting. Unconsciousness.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Rest. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: III 

STORAGE
Fireproof. 
PACKAGING
 
p-CYMENE ICSC: 0617
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air. 

Chemical dangers
Reacts with oxidants. Attacks rubber. 

Formula: C10H14 / CH3C6H4CH(CH3)2
Molecular mass: 134.2
Boiling point: 177°C
Melting point: -68°C
Relative density (water = 1): 0.85
Solubility in water, g/100ml at 25°C: 0.002
Vapour pressure, Pa at 20°C: 200
Relative vapour density (air = 1): 4.62
Flash point: 47°C c.c.
Auto-ignition temperature: 435°C
Explosive limits, vol% in air: 0.7-5.6
Octanol/water partition coefficient as log Pow: 4.1  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes and skin. If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of long-term or repeated exposure
The substance defats the skin, which may cause dryness or cracking. 


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       p-CYMENE (JECFA Evaluation)