International Chemical Safety Cards

BENZOYL PEROXIDE

ICSC: 0225

BENZOYL PEROXIDE
Dibenzoyl peroxide
Benzoyl superoxide
C₁₄H₁₀O₄
Molecular mass: 242.2
CAS # 94-36-0
RTECS # DM8575000
ICSC # 0225
UN # 3102
EC # 617-008-00-0

TYPES OF HAZARD/ EXPOSURE	ACUTE HAZARDS/ SYMPTOMS	PREVENTION	FIRST AID/ FIRE FIGHTING
FIRE	Explosive.	NO open flames, NO sparks and NO smoking. NO contact with flammable substances. NO contact with hot surfaces. Do NOT contaminate.	Water in large amounts.
EXPLOSION	Contamination, heat, shock or friction may cause explosion.	Do NOT expose to friction or shock.	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.	Ventilation (not if powder), local exhaust, or breathing protection.	Fresh air, rest. Refer for medical attention.
SKIN	Redness.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
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	Abdominal pain.	Do not eat, drink, or smoke during work.	Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Wet the product with water. Use non-sparking tools to sweep up spilled substance into a container (do not use cellulose-containing materials such as wood or paper). Wash away remainder with plenty of water. Do NOT absorb in saw-dust or other combustible absorbents.

Fireproof. Separated from combustible and reducing substances, acids. Cool.

E symbol
Xi symbol
R: 3-36/37/38
S: 3/7/9-14-27-34-37/39
UN Hazard Class: 5.2
UN Packing Group: II

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0225

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

BENZOYL PEROXIDE

ICSC: 0225

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PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALS OR POWDER WITH NO ODOUR.

PHYSICAL DANGERS:

CHEMICAL DANGERS:
May explosively decompose on shock, friction, or concussion. May explode on heating. On combustion, forms irritating and toxic fumes and gases of benzoic acid (see ICSC # 0103) and carbon monoxide (see ICSC # 0023). The substance decomposes on heating at 103°C. 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. Attacks some forms of plastics, rubber or coatings; fires and explosions may result.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV: ppm; 5 mg/m³ (as TWA) (ACGIH 1993-1994).
PDK not established.
MAK: ppm; 5 mg/m³; I (1992).
MAK: class I (1992).

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol.

INHALATION RISK:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates 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°C
Relative density (water = 1): 1.3
Solubility in water: poor
Vapour pressure, kPa at 20°C: <0.1

Relative vapour density (air = 1): 8.4
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.007
Auto-ignition temperature: 80°C

IMPORTANT LEGAL NOTICE:

Neither the CEC or 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. 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.