2,2-Dimethyl-4-pentenoic acid

  • 2,2-Dimethylpent-4-enoic acid
Formula
C7H12O2
Structure

Registry Numbers and Inventories.
CAS
16386-93-9
26 27 36/37/39 45
UN (DOT)
3265
Beilstein Reference
4-02-00-01585
Japan ENCS (MITI)
Listed

Properties.
Formula
C7H12O2
Formula mass
128.17
Melting point, °C
56
Boiling point, °C
202
Vapor pressure, mmHg
0.12 (25 C)
Critical temperature
401
Critical pressure
32.6
Density
0.933 g/cm3 (25 C)
Solubility in water
5.3 g/L (25 C)
Refractive index
1.4337 (20 C)
pKa/pKb
4.75 (pKa)
Partition coefficient, pKow
1.67
Heat of vaporization
48.31 kJ/mol

Hazards and Protection.
Storage
Keep away from heat and open flame. Store in a cool dry place.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Respirators
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator.
Small spills/leaks
Absorb on sand or vermiculite and place in closed containers for disposal. Ventilate area and wash spill site after material pickup is complete.
Stability
Harmful if swallowed, inhaled, or absorbed through skin. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. Inhalation may result in spasm, inflammation and edema of the larynxand bronchi, chemical pneumonitis, and pulmonary edema. Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract, eyes, and skin.
Incompatibilities
Strong oxidizing agents.
Decomposition
oxides of carbon.

Fire.
Flash Point,°C
88
Fire fighting
For small (incipient) fires, use media such as alcohol foam, dry chemical, or carbon dioxide. For large fires, apply water from as far as possible. Use very large quantities (flooding) of water applied as a mist or spray; solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.
UN number
3265
Response guide
Hazard class
8
Packing Group
II