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PIVALIC ACID ICSC: 0486
October 1995
2,2-Dimethylpropanoic acid
alpha,alpha-Dimethylpropionic acid
Trimethylacetic acid
Neopentanoic acid

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CAS # 75-98-9 C 5H 1 0O 2/(CH 3) 3CCOOH
RTECS # TO7700000 Molecular mass: 102.1
UN # 1759

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID /    FIRE FIGHTING   
FIRE Combustible.
NO open flames.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION


EXPOSURE


Inhalation Cough. Sore throat.
Local exhaust.
Fresh air, rest.
Skin Redness.
Protective gloves.
Rinse skin with plenty of water or shower.
Eyes Redness.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Burning sensation.
Do not eat, drink, or smoke during work.
Rinse mouth.

SPILLAGE DISPOSAL PACKAGING & LABELLING
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).
UN Hazard Class: 8
Do not transport with food and feedstuffs.

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-159
Separated from strong oxidants, food and feedstuffs.

IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID OR COLOURLESS TO WHITE CRYSTALS , WITH PUNGENT ODOUR.

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.
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.


PHYSICAL PROPERTIES
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
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

ENVIRONMENTAL DATA


NOTES


IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission

© IPCS 1999
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.


Updated by AS. Approved by EC. Last update: 10.10.2000.