Neopentanoic acid

  • Pivalic acid
  • 2,2-Dimethylpropanoic acid
  • a,a-Dimethylpropionic acid
  • Trimethylacetic acid
  • tert-Pentanoic acid
  • Versatic 5 acid
Formula
HOOCC(CH3)3
Structure
Description
Moist, white crystals or liquid with a pungent odor.
Uses
Intermediate, as a replacement for some natural materials.

Registry Numbers and Inventories.
CAS
75-98-9
EC (EINECS/ELINCS)
200-922-5
EC Class
harmful, irritant
R 21/22 34
S 26 36/37/39 45
RTECS
TO7700000
RTECS class
Tumorigen
UN (DOT)
1759
Merck
12,7667
Beilstein/Gmelin
969480
Beilstein Reference
4-02-00-00908
Swiss Giftliste 1
G-7395
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C5H10O2
Formula mass
102.13
Melting point, °C
32 - 35
Boiling point, °C
164
Vapor pressure, mmHg
0.91 (25 C)
Vapor density (air=1)
3.5
Density
0.90396 g/cm3 (40 C)
Solubility in water
25 g/L
Viscosity
2.37 cp (40 C)
Refractive index
1.4
pKa/pKb
4.94 (pKa)
Partition coefficient, pKow
0.94
Heat of fusion
2.1 kJ/mol
Heat of vaporization
44.4 kJ/mol
Heat of combustion
-2829 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
B3
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Do not allow contact with water. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Keep from contact with moist air and steam.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. Do not get water inside containers.
Disposal code
4
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents, strong reducing agents, bases.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
64
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Dusts may be combustible when exposed to heat, flame, or oxidizing agents. Containers may explode when heated. Extinguishing media: Use water spray to cool fire-exposed containers. Do NOT get water inside containers. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
This material is combustible.
Hazards
Produces vapors irritating to eyes and skin. Decomposes to produce acrid smoke and fumes.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
2
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Rapid heart rate and abnormally low blood pressure are common; low heart rate may occur. Both hyperpnea and apnea have been reported after rapid iv injection. lethargy and coma may occur. Dizziness and syncope have been reported following therapeutic use.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract.
   Skin
May cause severe irritation and possible burns. May be harmful if absorbed through the skin.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1759
Response guide
Hazard class
8
Packing Group
I; II; III
 
USCG CHRIS Code
TAA
 
HS Code
2915 60 90
 
Std. Transport #
4912051
 
IMO Chemical Code
17
IMO Pollution Category
D
IMO Hazard code
S