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BENZOYL PEROXIDE
ICSC: 0225
Peer-Review Status: 03.04.2002 Validated
Dibenzoyl peroxide
Benzoyl superoxide 
CAS #: 94-36-0 RTECS #: DM8575000
UN #: 3104
EC #: 617-008-00-0
EINECS #: 202-327-6
    Formula: C14H10O4
Molecular mass: 242.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Many reactions may cause fire or explosion.  NO open flames, NO sparks and NO smoking. NO contact with flammables. NO contact with hot surfaces.  Use water in large amounts. 
EXPLOSION Risk of fire and explosion. Explosive. See Chemical Dangers.  Do NOT expose to friction or shock. Use non-sparking handtools.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety goggles.  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
PACKAGING & LABELLING
Evacuate danger area! Remove all ignition sources. Wash away remainder with plenty of water. Do NOT absorb in saw-dust or other combustible absorbents.   
EC Classification
Symbol: E, Xi; R: 2-36-43; S: (1/2)-3/7-14-36/37/39 
UN Classification
UN Hazard Class: 5.2; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-52GP1-S.
NFPA Code: H1; F4; R4; OX. 
Fireproof. Separated from combustible substances and reducing agents. Store only in original packaging. See Chemical Dangers. 

IMPORTANT DATA
Physical State; Appearance
WHITE CRYSTALS OR POWDER. 

Physical dangers
 

Chemical dangers
May decompose explosively on shock, friction or concussion. May explode on heating above 103-105°C. On combustion, forms irritating and toxic fumes and gases of benzoic acid (see ICSC 0103) and carbon monoxide (see ICSC 0023). The substance is a strong oxidant. It reacts violently with combustible and reducing materials. Reacts violently with many organic acids, inorganic acids, alcohols and amines. This generates fire and explosion hazard. 

Occupational exposure limits
TLV: 5mg/m³ as TWA; A4 (not classifiable as a human carcinogen);.
MAK (inhalable fraction): 5 mg/m³; Peak limitation category: I(1); (DFG 2005). 

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

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

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

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 103-105°C
Density: 1.3 g/cm³
Solubility in water: poor
Vapour pressure, kPa at 20°C: <0.1
Auto-ignition temperature: 80°C
Octanol/water partition coefficient as log Pow: 3.46  
 

NOTES
Carrier solvents used in commercial formulations may change physical and toxicological properties.
Rinse contaminated clothes (fire hazard) with plenty of water.
Card has been partly updated in October 2006: see sections Packaging, and Ingestion first aid. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
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.
    See Also:
       Toxicological Abbreviations
       BENZOYL PEROXIDE (JECFA Evaluation)
       Benzoyl peroxide (SIDS)
       Benzoyl Peroxide (IARC Summary & Evaluation, Volume 71, 1999)