tert-Butyl borate

  • Tri-tert-butyl borate
  • Tri-tert-butoxyborane
  • Tris(tert-butyloxy)borane
  • Tris(tert-butyl) borate
  • Boric acid, tris(1,1-dimethylethyl) ester
Formula
C12H27BO3
Structure
Description
Clear, colorless liquid.

Registry Numbers and Inventories.
CAS
7397-43-5
UN (DOT)
1993
Beilstein/Gmelin
1703744
Beilstein Reference
4-01-00-01627
Japan ENCS (MITI)
Listed

Properties.
Formula
C12H27BO3
Formula mass
230.15
Melting point, °C
18 - 19
Boiling point, °C
175
Vapor pressure, mmHg
1.6 (25 C)
Density
0.8104 g/cm3
Solubility in water
Insoluble
Refractive index
1.3902 (15 C)
Partition coefficient, pKow
5.14
Heat of vaporization
39.5 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Keep under a nitrogen blanket. Flammables-area.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Container should be opened by a technically qualified person. Use only in a chemical fume hood.
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.
Stability
No data.
Incompatibilities
Strong oxidizing agents, moist air or water.
Decomposition
Carbon monoxide, carbon dioxide, oxides of boron.

Fire.
Flash Point,°C
29
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Can burn in a fire, releasing toxic vapors. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use agent most appropriate to extinguish fire.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Get medical aid. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.

Transport.
UN number
1993
Response guide
Hazard class
3
Packing Group
I; II; III