2,2,6,6-Tetramethyl-3,5-heptanedione

  • Dipivaloylmethane
Formula
(CH3)3CCOCH2COC(CH3)3
Structure
Description
Clear slightly yellow liquid.

Registry Numbers and Inventories.
CAS
1118-71-4
EC (EINECS/ELINCS)
214-268-3
S 23 24/25
Beilstein/Gmelin
1447269
Beilstein Reference
4-01-00-03729
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C11H20O2
Formula mass
184.28
Melting point, °C
28 - 30
Boiling point, °C
203
Vapor pressure, mmHg
0.29 (25 C)
Density
0.88 g/cm3
Solubility in water
Insoluble
Refractive index
1.4589 (20 C)
Partition coefficient, pKow
2.80
Heat of vaporization
43.9 kJ/mol
Heat of combustion
-6599 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Protection
Eyes: Wear chemical goggles. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
67
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Health.
Exposure effects
   Ingestion
The toxicological properties of this substance have not been fully investigated.
   Inhalation
No hazard expected in normal industrial use. The toxicological properties of this substance have not been fully investigated.
   Skin
No information regarding skin irritation and other potential effects was found.
   Eyes
No information regarding eye irritation and other potential effects was found.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2914 19 90