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PIVALIC ACIDICSC: 0486
October 1995
CAS #: 75-98-92,2-Dimethylpropanoic acid
alpha,alpha-Dimethylpropionic acid
Trimethylacetic acid
Neopentanoic acid
UN #: 1759
EINECS #: 200-922-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.    NO open flames.    Use water spray, powder, alcohol-resistant foam, carbon dioxide.   

   
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat.  Use local exhaust.  Fresh air, rest. 
Skin Redness.  Protective gloves.  Rinse skin with plenty of water or shower. 
Eyes Redness.  Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Burning sensation.  Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: filter respirator for organic gases and particulates adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in sealable containers as far as possible. If solid: sweep spilled substance into containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 8 

STORAGE
Separated from strong oxidants and food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
PIVALIC ACID ICSC: 0486
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID OR COLOURLESS-TO-WHITE CRYSTALS WITH PUNGENT ODOUR. 

Physical dangers
 

Chemical dangers
The solution in water is a weak acid. The substance is a weak base. Reacts violently with strong oxidants. Attacks many metals. This produces flammable/explosive gas (hydrogen - see ICSC 0001). 

Formula: C5H10O2 / (CH3)3CCOOH
Molecular mass: 102.1
Boiling point: 164°C
Melting point: 36°C
Relative density (water = 1): 0.91
Solubility in water, g/100ml at 20°C: 2.5
Vapour pressure, kPa at 20°C: 0.1
Relative vapour density (air = 1): 3.5
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: 64°C c.c.
Octanol/water partition coefficient as log Pow: 1.4  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating 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
 

ENVIRONMENT
 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations