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DI-tert-BUTYL PEROXIDEICSC: 1019
Bis(1,1-dimethylethyl)peroxide
tert-Butyl peroxide
DTBP
November 1998
CAS #: 110-05-4
UN #: 3107
EC Number: 203-733-6

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Many reactions may cause fire or explosion.  Vapour/air mixtures are explosive.  NO open flames, NO sparks and NO smoking. NO contact with flammables. NO contact with contaminants. NO contact with hot surfaces.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  Use water spray, powder, foam, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Shortness of breath. Sore throat.  Use ventilation.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin   Protective gloves.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. 
Eyes Redness. Pain.  Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal cramps. Vomiting. Further see Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Remove all ignition sources. 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. Do NOT wash away into sewer. Do NOT absorb in saw-dust or other combustible absorbents. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 5.2; UN Pack Group: II 

STORAGE
Fireproof. Separated from combustible substances and reducing agents. Cool. Well closed. 
PACKAGING
Special material. 
DI-tert-BUTYL PEROXIDE ICSC: 1019
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes at 111°C. This increases fire hazard. The substance is a strong oxidant. It reacts violently with combustible and reducing materials. 

Formula: C8H18O2 / (CH3)3COOC(CH3)3
Molecular mass: 146.2
Decomposes at 111°C
Melting point: -40°C
Relative density (water = 1): 0.8
Solubility in water: none
Vapour pressure, kPa at 20°C: 2.6
Relative vapour density (air = 1): 5
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.1
Flash point: 12°C c.c.
Octanol/water partition coefficient as log Pow: 1-4  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract. 

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
 


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
 

NOTES
Explosive limits are unknown in literature, although the substance is combustible and has a flash point < 55°C.
Health effects of exposure to the substance have not been investigated adequately.
Rinse contaminated clothes (fire hazard) with plenty of water. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: O, F; R: 7-11; S: (2)-3/7-14-16-36/37/39 

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    See Also:
       Toxicological Abbreviations