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DICUMYL PEROXIDEICSC: 1346
October 1999
CAS #: 80-43-3Peroxide, bis(1-methyl-1-phenylethyl)
Bis(alpha,alpha-dimethylbenzyl)peroxide
Diisopropylbenzene peroxide
UN #: 3110
EINECS #: 201-279-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Finely dispersed particles form explosive mixtures in air.  NO open flames.  Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use water spray, powder, foam, carbon dioxide.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. 
Eyes Redness.  Wear safety spectacles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   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 CLASSIFICATION & LABELLING
Remove all ignition sources. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment. Personal protection: P2 filter respirator for harmful particles. 

According to UN GHS Criteria

 

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

STORAGE
Fireproof. Separated from combustible substances, reducing agents, strong oxidants, strong acids, bases and heavy metals. Cooled. Keep in the dark. Well closed. Keep under inert gas. 
PACKAGING
 
DICUMYL PEROXIDE ICSC: 1346
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
YELLOW-TO-WHITE CRYSTALLINE POWDER. 

Physical dangers
 

Chemical dangers
Decomposes rapidly on heating. Decomposes rapidly under the influence of light. This generates fire and explosion hazard. Reacts violently with acids, bases, reducing agents and heavy metals. 

Formula: C18H22O2 / (C6H5C(CH3)2O)2
Molecular mass: 270.4
Decomposes at 130°C
Melting point: 39°C
Density: 1.0 g/cm³
Solubility in water: none
Relative vapour density (air = 1): 9.3
Flash point: 71°C c.c.
Octanol/water partition coefficient as log Pow: 5.5  


EXPOSURE & HEALTH EFFECTS

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

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
 

ENVIRONMENT
The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: O, Xi, N; R: 7-36/38-51/53; S: (2)-3/7-14-36/37/39-61 

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    See Also:
       Toxicological Abbreviations