ICSC 1346 - DICUMYL PEROXIDE

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DICUMYL PEROXIDE	ICSC: 1346 (October 1999)
Peroxide, bis(1-methyl-1-phenylethyl) Bis(alpha,alpha-dimethylbenzyl)peroxide Diisopropylbenzene peroxide

CAS #: 80-43-3

UN #: 3110

EC Number: 201-279-3

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Finely dispersed particles form explosive mixtures in air.	NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.	Use water spray, powder, foam, carbon dioxide.

PREVENT DISPERSION OF DUST!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat.	Use local exhaust or breathing protection.	Fresh air, rest.
Skin	Redness.	Protective gloves.	First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again.
Eyes	Redness.	Wear safety spectacles or eye protection in combination with breathing protection.	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	CLASSIFICATION & LABELLING
Remove all ignition sources. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment. Personal protection: P2 filter respirator for harmful particles.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 5.2; UN Pack Group: II
STORAGE
Fireproof. Separated from combustible substances, reducing agents, strong oxidants, strong acids, bases and heavy metals. Cooled. Keep in the dark. Well closed. Keep under inert gas.
PACKAGING

DICUMYL PEROXIDE

ICSC: 1346

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance YELLOW-TO-WHITE CRYSTALLINE POWDER. Physical dangers Chemical dangers Decomposes rapidly on heating. Decomposes rapidly under the influence of light. This generates fire and explosion hazard. Reacts violently with acids, bases, reducing agents and heavy metals.	Formula: C₁₈H₂₂O₂ / (C₆H₅C(CH₃)₂O)₂ Molecular mass: 270.4 Decomposes at 130°C Melting point: 39°C Density: 1.0 g/cm³ Solubility in water: none Relative vapour density (air = 1): 9.3 Flash point: 71°C c.c. Octanol/water partition coefficient as log Pow: 5.5

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
YELLOW-TO-WHITE CRYSTALLINE POWDER.

Physical dangers

Chemical dangers
Decomposes rapidly on heating. Decomposes rapidly under the influence of light. This generates fire and explosion hazard. Reacts violently with acids, bases, reducing agents and heavy metals.

Formula: C₁₈H₂₂O₂ / (C₆H₅C(CH₃)₂O)₂
Molecular mass: 270.4
Decomposes at 130°C
Melting point: 39°C
Density: 1.0 g/cm³
Solubility in water: none
Relative vapour density (air = 1): 9.3
Flash point: 71°C c.c.
Octanol/water partition coefficient as log Pow: 5.5

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its aerosol. Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract.	Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

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

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

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

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT
The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish.

NOTES

ADDITIONAL INFORMATION

EC Classification
Symbol: O, Xi, N; R: 7-36/38-51/53; S: (2)-3/7-14-36/37/39-61

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