Dibenzoyl peroxide
Benzoyl superoxide
C14H10O4
Molecular mass: 242.2
ICSC # 0225
CAS # 94-36-0
RTECS # DM8575000
UN # 3104
EC # 617-008-00-0
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Explosive.
Many reactions may cause fire or explosion.
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NO open flames, NO sparks and NO smoking.
NO contact with flammable substances.
NO contact with hot surfaces.
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Water in large amounts.
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Explosion
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Risk of fire and explosion.
See Chemical Dangers.
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Do NOT expose to friction or shock.
Use non-sparking handtools.
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In case of fire: keep drums, etc., cool by spraying with water.
Combat fire from a sheltered position.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
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Safety goggles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give one or two glasses of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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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.
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Fireproof.
Separated from
combustible and reducing substances.
Store only in original packaging.
See Chemical Dangers.
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E symbol
Xi symbol
R: 2-36-43
S: 1/2-3/7-14-36/37/39
UN Hazard Class: 5.2
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Important Data
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Physical State; Appearance:
WHITE
CRYSTALS
OR POWDER
Physical Dangers:
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 with
many organic and inorganic
acids
,
alcohols
and
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).
OSHA PEL: TWA 5 mg/m3
NIOSH REL: TWA 5 mg/m3
NIOSH IDLH: 1500 mg/m3 See: 94360
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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.
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Physical
Properties
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Melting point (decomposes): 103-105°C
Density: 1.3
g/cm3
Solubility in water:
poor
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Vapour pressure, kPa at 20°C: <0.1
Auto-ignition temperature: 80°C
Octanol/water partition coefficient as log Pow: 3.46
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Environmental
Data
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N O T E S
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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.
Transport Emergency Card: TEC (R)-52GP1-S
NFPA Code: H 1; F 4; R 4; ox
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ADDITIONAL INFORMATION
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ICSC: 0225
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BENZOYL PEROXIDE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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