Triethylboron

  • Boron ethyl
  • Boron triethyl
  • Triethylborane
  • Triethylborine
Formula
C6H15B
Structure
Description
Colorless liquid.
Uses
Fuel additive, igniter or fuel for jet & rocket engines, olefin polymerization catalyst, intermediate.

Registry Numbers and Inventories.
CAS
97-94-9
EC (EINECS/ELINCS)
202-620-9
R 11 34
S 7 23 26 36/37/39 43 45
RTECS
ED2100000
RTECS class
Other
UN (DOT)
2924
Beilstein/Gmelin
1731462
Beilstein Reference
4-04-00-04359
Swiss Giftliste 1
G-2968
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H15B
Formula mass
97.99
Melting point, °C
-92.9
Boiling point, °C
94 - 95
Vapor pressure, mmHg
50 (25 C)
Density
0.675 g/cm3
Solubility in water
Slightly soluble
Refractive index
1.3988 (20 C)
Partition coefficient, pKow
1.69
Heat of vaporization
32.2 kJ/mol
Heat of combustion
-4508 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Trialkylboranes are stable indefinitely when stored under an inert atmosphere.
Incompatibilities
It will react with water or steam to produce toxic and flammable vapors; it can react vigorously with oxidizing materials.

Fire.
Flash Point,°C
12
Fire fighting
Do not use halogenated extinguishing agents.
Fire potential
Spontaneously flammable in air
Combustion products
When heated to decomposition or upon contact with air, it emits toxic fumes.

Health.
Poison_Class
2
Exposure effects
Significant ingestions or dermal exposures can be associated with weak, rapid pulse, cyanosis and abnormally low blood pressure. The patient may present with reduced body temperature, elevated body temperature or normal body temperature. Headache, lethargy, restlessness, weakness, CNS irritation, and/or seizures may occur with long term or repeated exposures. There is insufficient information concerning the reproductive effects of borates in humans. Adverse testicular effects and infertility have been reported in animals. <br>There have been limited animal studies which suggest decreased ovulation, fetotoxicity and developmental defects may occur with very high exposure levels. Maternal toxicity was present in some studies.
   Ingestion
Nausea, vomiting, and diarrhea are common. The vomitus and feces may be blue-green in color. Hemorrhagic gastroenteritis can occur.
   Skin
The oral mucosa, lips and throat may be red. Erythematous rash with desquamation (cooked lobster syndrome) may develop on the palms, soles, and buttocks. A generalized rash has also been reported.

First aid
 
   Ingestion
Administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Observe for systemic effects which chiefly occur from chronic skin exposure, or application of borates to denuded skin. Treatment should include recommendations listed in the oral exposure section when appropriate.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
2924
Response guide