DICUMYL PEROXIDE 1346
October 1999
Peroxide, bis(1-methyl-1-phenylethyl)
CAS No: 80-43-3
Bis(alpha,alpha-dimethylbenzyl)peroxide
RTECS No: SD8150000
Diisopropylbenzene peroxide
UN No: 3110
C18H22O2 / (C6H5C(CH3)2O)2
EC No: 617-006-00-X
Molecular mass: 270.4
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Combustible. NO open flames. Powder, water spray, foam, carbon
FIRE
dioxide.
Finely dispersed particles form Prevent deposition of dust; closed
EXPLOSION
explosive mixtures in air. system, dust explosion-proof
electrical equipment and lighting.
EXPOSURE PREVENT DISPERSION OF DUST!
Cough. Sore throat. Local exhaust or breathing Fresh air, rest.
Inhalation
protection.
Redness. Protective gloves. First rinse with plenty of water, then
Skin
remove contaminated clothes and
rinse again.
Redness. Safety spectacles, or eye protection First rinse with plenty of water for
Eyes
in combination with breathing several minutes (remove contact
protection. lenses if easily possible), then take
to a doctor.
Do not eat, drink, or smoke during Rinse mouth. Give plenty of water
Ingestion
work. to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Remove all ignition sources. Sweep spilled O Symbol
substance into containers; if appropriate, moisten Xi Symbol
first to prevent dusting. Carefully collect remainder, N Symbol
then remove to safe place. Do NOT let this chemical R: 7-36/38-51/53
enter the environment. (Extra personal protection: S: (2-)3/7-14-36/37/39-61
P2 filter respirator for harmful particles). UN Hazard Class: 5.2
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Fireproof. Separated from combustible and reducing substances, strong
oxidants, strong acids, bases, and heavy metals. Cooled. Keep in the dark.
Well closed. Keep under inert gas.
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission
International 漏 IPCS 2000
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
1346 DICUMYL PEROXIDE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
YELLOW TO WHITE CRYSTALLINE POWDER The substance can be absorbed into the body by inhalation of
its aerosol.
Chemical dangers
Inhalation risk
The substance decomposes rapidly on heating and under
influence of light, causing fire and explosion hazard. Reacts Evaporation at 20掳C is negligible; a harmful concentration of
violently with acids, bases, reducing agents, and heavy metals. airborne particles can, however, be reached quickly when
dispersed.
Occupational exposure limits
Effects of short-term exposure
TLV not established.
The substance irritates the eyes, the skin, and the respiratory
tract.
PHYSICAL PROPERTIES
Boiling point (decomposes): 130掳C Relative vapour density (air = 1): 9.3
Melting point: 39掳C Flash point: 71掳C c.c.
Density: 1.0 g/cm3 Octanol/water partition coefficient as log Pow: 5.5
Solubility in water, g/100 ml: none
ENVIRONMENTAL DATA
The substance is toxic to aquatic organisms. In the food chain important to humans, bioaccumulation takes place, specifically in
fish.
NOTES
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE for the use which might be made of this information
漏IPCS 2000
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