Tributyl borate

  • Boron tributoxide
  • Butyl borate
  • n-Butyl borate
  • Tributoxyborane
  • Tri-n-butoxyborane
  • Tributoxyborine
Formula
C12H27BO3
Structure
Description
Oil.
Uses
Welding fluxes, intermediate in preparation of borohydrides, flame retardant for textiles (with boric acid).

Registry Numbers and Inventories.
CAS
688-74-4
EC (EINECS/ELINCS)
211-706-5
R 36/38
RTECS
ED4900000
RTECS class
Primary Irritant
Beilstein/Gmelin
1703865
Beilstein Reference
4-01-00-01544
Swiss Giftliste 1
G-6192
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C12H27BO3
Formula mass
230.20
Melting point, °C
-70
Boiling point, °C
230
Vapor pressure, mmHg
0.1 (25 C)
Vapor density (air=1)
7.95
Density
0.8567 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
1.601 cp @ 25C
Refractive index
1.4118 (17 C)
Partition coefficient, pKow
6.23
Heat of vaporization
44.8 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.
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.
Stability
No data.
Incompatibilities
Strong oxidizing agents, strong acids, moist air or water.
Decomposition
Carbon monoxide, carbon dioxide, oxides of boron.

Fire.
Flash Point,°C
93
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 spray, dry chemical, carbon dioxide, or chemical foam.
Health
3
 
Flammability
2
 
 
Reactivity
1
 

Health.
Poison_Class
4
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
May cause irritation of the digestive tract.
   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.