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tert-BUTYL HYDROPEROXIDE (70 % AQUEOUS SOLUTION)ICSC: 0842 (October 1999)
1,1-Dimethylethylhydroxiperoxide
2-Hydroperoxy-2-methylpropane
CAS #: 75-91-2
UN #: 3109
EC Number: 200-915-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Flammable. Many reactions may cause fire or explosion.  Risk of fire and explosion on heating. Above 43°C explosive vapour/air mixtures may be formed.  NO open flames, NO sparks and NO smoking. NO contact with flammables.  Above 43°C use a closed system, ventilation and explosion-proof electrical equipment.  Use water spray, dry sand, powder, alcohol-resistant foam, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS PREVENTION FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 5.2; UN Pack Group: II 

STORAGE
Fireproof. Separated from combustible substances and reducing agents. Cool. Inspect container frequently to identify bulging and leaking. 
PACKAGING
 
tert-BUTYL HYDROPEROXIDE (70 % AQUEOUS SOLUTION) ICSC: 0842
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: C4H10O2 / (CH3)3COOH
Molecular mass: 90.1
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) 


EXPOSURE & HEALTH EFFECTS

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

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

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 long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.1 ppm as TWA; (skin).
MAK: skin absorption (H) 

ENVIRONMENT
 

NOTES
Rinse contaminated clothing with plenty of water because of fire hazard.
UN number (for solvents other than water): 3105. 

ADDITIONAL INFORMATION
  EC Classification
 

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