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BENZOYL PEROXIDE ICSC: 0225
Date of Peer Review: April 2002

Dibenzoyl peroxide
Benzoyl superoxide
CAS # 94-36-0 C14H10O4
RTECS # DM8575000 Molecular mass: 242.2
UN # 3104
EC Annex 1 Index # 617-008-00-0
EC/EINECS # 202-327-6
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Explosive. Many reactions may cause fire or explosion.
NO open flames, NO sparks and NO smoking. NO contact with flammable substances. NO contact with hot surfaces.
Water in large amounts.
EXPLOSION Risk of fire and explosion.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.
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.
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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 in case of large spill! Remove all ignition sources. Wash away remainder with plenty of water. Do NOT absorb in saw-dust or other combustible absorbents.

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-52GP1-S
NFPA Code: H 1; F 4; R 4; ox
Fireproof. Separated from combustible and reducing substances.Store only in original packaging. See Chemical Dangers.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities © IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
BENZOYL PEROXIDE ICSC: 0225
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALS OR POWDER

CHEMICAL DANGERS:
May explosively decompose 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 and reacts violently with combustible and reducing materials. Reacts violently withmany organic and inorganic acids, alcoholsand amines causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 mg/m³ as TWA A4 (ACGIH 2001).
MAK: 5 mg/m³ (Inhalable fraction) 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, the skin and the respiratory tract.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization.
PHYSICAL PROPERTIES
Melting point (decomposes): 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
ENVIRONMENTAL DATA

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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
© IPCS, CEC 2005


    See Also:
       Toxicological Abbreviations
       BENZOYL PEROXIDE (JECFA Evaluation)
       Benzoyl peroxide (SIDS)
       Benzoyl Peroxide (IARC Summary & Evaluation, Volume 71, 1999)