2,2-Dimethylpropanoic acid
alpha,alpha-Dimethylpropionic acid
Trimethylacetic acid
Neopentanoic acid
C5H10O2 / (CH3)3CCOOH
Molecular mass: 102.1
ICSC # 0486
CAS # 75-98-9
RTECS # TO7700000
UN # 1759
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
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NO open flames.
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Powder, alcohol-resistant foam, water spray, carbon dioxide.
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Explosion
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Exposure
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•Inhalation
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Cough.
Sore throat.
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Local exhaust.
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Fresh air, rest.
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•Skin
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Redness.
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Protective gloves.
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Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Burning sensation.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking liquid in sealable containers.
If solid:
sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water.
(Extra personal protection: A/P2 filter respirator for organic vapour and harmful dust).
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Separated from
strong oxidants,
food and feedstuffs.
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Do not transport with food and feedstuffs.
UN Hazard Class: 8
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Important Data
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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 forming flammable/explosive gas (hydrogen - see
ICSC # 0001).
Occupational Exposure Limits:
TLV not established.
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol,
through the skin and
by ingestion.
Inhalation Risk:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
irritates
the eyes,
the skin and
the respiratory tract.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 164°C
Melting point: 36°C
Relative density (water = 1): 0.91
Solubility in water, g/100 ml at 20°C: 2.5
Vapour pressure, kPa at 20°C: 0.1
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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
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Environmental
Data
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N O T E S
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Transport Emergency Card: TEC (R)-159
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ADDITIONAL INFORMATION
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ICSC: 0486
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PIVALIC ACID
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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