Triisobutylaluminium

Product description

Triisobutylaluminium
Molecular formula
Molecular weight
CAS No．
EINECS/ELINCS No
TSCA status

:（isoC₄H₉）₃AL
:198.3
:100-99-2
:202-906-3
:listed on inventory

Composition

Component

Triethylaluminum^a
Tri-n-butylaluminum^a
Other R₃AL^a
Hydride,as AIH₃^a
Isobutylene

Aluminum^b

Specification
(wt%)
97.0 min
0.5 max
--
0.8 max.
4.0 max.
(wt%)
13.4 min.

Typical
(wt%)
98.8
0.2
0.1
0.5
2.6
(wt%)
22.5min

characteristics

Appearance
Density,30℃
Melting point
Viscosity,30℃
Boiling point,1 mm Hg
Stability to air
Stability to water

Solubility

:clear,colorless liquid
:0.776 g/ml
:0℃
:1.7 mPa .s
:46℃
: ignites upon exposure
reacts violently，may ignite
upon contact
: soluble In aromatic and
saturated aliphatic and
cycloaliphatic hydrocarbons

Thermochemical
properties

Specific heat,57℃
Heat of vaporization △Hv at NBPc,l bar
Heat of hydrolysis,25℃
Heat of formation △Hf0,25℃,1 bar
Heat of combustion △Hc0,,25℃

:2.125 J/g℃(0.508 cal/g.℃)
:230 J/g(55 cal/g)
:2782 J/g(665cal/g)
:-293 KJ/mole(-70 kcal/mole)
:-9029 KJ/mole(-2158 kcal/mole)

Availability

TIBA is commercial product available as the neat pyrophoric liquid and as pyrophoric and nonpyrophoric solutions in a variety of hydrocarbon solvents.

Storage

TIBA and its solutions are stable when stored under a dry，inert
atmosphere and away from heat．TIBA decomposes slowly above~50℃ to
Produce diisobutylaluminum hydride(DIBAL-H) and isobutylene．Further
heating will result in decomposition of DIBAL-H to hydrogen．isobutylene
and elementaI aluminum．

Packaging and
transport

TIBA and its solutions are available worldwide in cylinders and portable
tanks．
In North America． TIBA is also available in tank trailers and rail cars．
Containers are fabricated from carbon steel and are equipped with dip
tubes for top discharge and all connections are located in the vapor space
Both packaging and transport meet the international regulations

Safety and handling

TIBA ignites upon exposure to air and reacts violently with water．
Hydrocarbon solutions of TIBA may also ignite upon exposure to air．
TIBAL and its solutions must be handled under a dry，inert atmosphere．
e．g．nitrogen or argon．Water must be scrupulously removed from process
equipment prior to putting it into metal alkyls service．Failure to do So may
result in an explosion．Products of complete combustion of TIBA and its solutions are aluminum oxide．carbon dioxide and water．TIBA causes severe burns to the skin and eyes．It is imperative that proper personal protective equipment be worn when handling TIBA ．
Please refer to the Material Safety Data Sheet(MSDS)for further
information on the safe storage，use and handling of TIBA．This
information should be thoroughly reviewed prior to acceptance of this product．

Applications

TIBA is used as a catalyst in the Ziegler-Natta polymerization of olefins,Cis-polybutadiene rubber,Polyisoprene Rubber