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BENZOYL PEROXIDE

ICSC: 0225

Dibenzoyl peroxide
Benzoyl superoxide
C14H10O4
Molecular mass: 242.2
ICSC # 0225 		CAS # 94-36-0
RTECS # DM8575000
UN # 3104
EC # 617-008-00-0
April 03, 2002 Validated

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

STORAGE

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.
Fireproof. Separated from combustible and reducing substances. Store only in original packaging. See Chemical Dangers.

E symbol
Xi symbol
R: 2-36-43
S: 1/2-3/7-14-36/37/39
UN Hazard Class: 5.2
ICSC: 0225 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

BENZOYL PEROXIDE

ICSC: 0225

I

M

P

O

R

T

A

N

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D

A

T

A

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


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


N O T E S

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

ADDITIONAL INFORMATION



ICSC: 0225 BENZOYL PEROXIDE
(C) IPCS, CEC, 1994
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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