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tert-BUTYL HYDROPEROXIDE (70 % AQUEOUS SOLUTION)
ICSC: 0842
Peer-Review Status: 20.10.1999 Validated
1,1-Dimethylethylhydroxiperoxide
2-Hydroperoxy-2-methylpropane 
CAS #: 75-91-2 RTECS #: EQ4900000
UN #: 3109
EINECS #: 200-915-7
 		    Formula: C4H10O2 / (CH3)3COOH
Molecular mass: 90.1

TYPES OF
HAZARD /
EXPOSURE 		ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Flammable. Many reactions may cause fire or explosion.  NO open flames, NO sparks and NO smoking. NO contact with flammables.  Use water spray, dry sand, powder, alcohol-resistant foam, carbon dioxide. 
EXPLOSION Risk of fire and explosion on heating. Above 43°C explosive vapour/air mixtures may be formed.  Above 43°C use a closed system, ventilation and explosion-proof electrical equipment.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 
 
EXPOSURE   PREVENT GENERATION OF MISTS!   
Inhalation Burning sensation. Cough. Laboured breathing.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Pain. Redness. Blisters.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Severe deep burns.  Wear face shield 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 Abdominal cramps. Burning sensation. Weakness.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT absorb in saw-dust or other combustible absorbents.   
EC Classification
 
UN Classification
UN Hazard Class: 5.2; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-839.
NFPA Code: H1; F4; R4; OX.  		Fireproof. Separated from combustible substances and reducing agents. Cool. Inspect container frequently to identify bulging and leaking. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID WITH PUNGENT ODOUR. 

Physical dangers
 

Chemical dangers
May explode on heating. The substance is a strong oxidant. It reacts violently with combustible and reducing materials, metallic compounds and sulfur compounds. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

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

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 89°C
Melting point: -3°C
Relative density (water = 1): 0.93
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 3.07 (calculated)
Relative vapour density (air = 1): 3.1
Flash point: 43°C
Auto-ignition temperature: 238°C
Explosive limits, vol% in air: 5-10
Octanol/water partition coefficient as log Pow: -1.3 (calculated)  		 

NOTES
Rinse contaminated clothes (fire hazard) with plenty of water.
UN number (for solvents other than water): 3105.
TBHP-70 and Trigonox A-75 are trade names. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety 		WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information. 
    See Also:
       Toxicological Abbreviations