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PIVALIC ACIDICSC: 0486
2,2-Dimethylpropanoic acid
alpha,alpha-Dimethylpropionic acid
Trimethylacetic acid
Neopentanoic acid
May 2018
CAS #: 75-98-9
UN #: 3261
EC Number: 200-922-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Above 64°C explosive vapour/air mixtures may be formed.  NO open flames.  Above 64°C use a closed system and ventilation.  Use water spray, powder, alcohol-resistant foam, carbon dioxide.   

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat.  Use local exhaust.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Rinse skin with plenty of water or shower. Refer for medical attention if skin irritation occurs. 
Eyes Redness. Pain.  Wear safety goggles.  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. Absorb liquid in sand or inert absorbent. If solid: sweep spilled substance into containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water. Store and dispose of according to local regulations. 

According to UN GHS Criteria

excl mark;warn
WARNING
Harmful if swallowed or in contact with skin
Causes skin irritation
Causes serious eye irritation 

Transportation
UN Classification
UN Hazard Class: 8; UN Pack Group: II 

STORAGE
Separated from strong oxidants, bases and food and feedstuffs. Dry. Well closed. Ventilation along the floor. 
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. Reacts with bases and strong oxidants. This generates fire and explosion hazard. 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 (sparingly soluble)
Vapour pressure, Pa at 20°C: 85
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.
Auto-ignition temperature: 560°C
Explosive limits, vol% in air: 1.6-?
Octanol/water partition coefficient as log Pow: 1.4
Viscosity: 4.2 mm²/s at 37.8°C 


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 severely irritating to the eyes, skin and upper respiratory tract. The substance is irritating to the gastrointestinal 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