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257222

Sigma-Aldrich

Trimethylaluminum

97%

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Synonym(s):
Aluminum trimethanide, TMA
Linear Formula:
(CH3)3Al
CAS Number:
Molecular Weight:
72.09
Beilstein/REAXYS Number:
3587197
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

vapor pressure

69.3 mmHg ( 60 °C)

Quality Level

description

heat of vaporization: ~41.9 kJ/mol (dimer)

assay

97%

form

liquid

reaction suitability

core: aluminum

bp

125-126 °C (lit.)
127 °C/760 mmHg
20 °C/8 mmHg
56 °C/50 mmHg

mp

15 °C (lit.)

density

0.752 g/mL at 25 °C (lit.)

SMILES string

C[Al](C)C

InChI

1S/3CH3.Al/h3*1H3;

InChI key

JLTRXTDYQLMHGR-UHFFFAOYSA-N

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1 of 4

This Item
663301379239257168
vibrant-m

257222

Trimethylaluminum

vibrant-m

663301

Trimethylaluminum

vibrant-m

379239

Trimethylaluminum solution

vibrant-m

257168

Triethylaluminum

form

liquid

form

liquid

form

liquid

form

-

mp

15 °C (lit.)

mp

15 °C (lit.)

mp

-

mp

−50 °C (lit.)

vapor pressure

69.3 mmHg ( 60 °C)

vapor pressure

69.3 mmHg ( 60 °C)

vapor pressure

-

vapor pressure

1 mmHg ( 62.2 °C)

bp

125-126 °C (lit.), 20 °C/8 mmHg, 127 °C/760 mmHg, 56 °C/50 mmHg

bp

125-126 °C (lit.), 127 °C/760 mmHg, 20 °C/8 mmHg, 56 °C/50 mmHg

bp

-

bp

128-130 °C/50 mmHg (lit.)

description

heat of vaporization: ~41.9 kJ/mol (dimer)

description

heat of vaporization: ~41.9 kJ/mol (Dimer)

description

-

description

-

General description

Trimethylaluminum (TMA) is the most reactive and volatile among all organoaluminium compounds. It is extremely pyrophoric. It acts as a highly reactive reducing and alkylating agent.

Application

TMA is used in a Ziegler Natta catalyst for polymerization and hydrogenation. TMA is mainly used for the production of methylaluminoxane, such as metalorganic chemical vapor deposition (MOCVD) of:
  • Al2O3 using TMA and O2 precursors.
  • Al4C3 layers have been grown on Al2O3 (0001) using TMA and methane as source materials for aluminum and carbon.

Packaging

Supplied in a Sure/Pac cylinder with a 1/4-turn bronze ball valve (Z122661) installed. This has a female 1/4"" NPT outlet thread and is closed with a male 1/4"" NPT carbon steel plug. The plug must be removed before use after ensuring the valve is in the closed position.

Compatible with the following:For instructions please refer to technical bulletin AL-136: The Aldrich Sure/Pac Cylinder System

Other Notes

Storage below 20°C may cause crystallization.

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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pictograms

FlameCorrosion

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Pyr. Liq. 1 - Skin Corr. 1B - Water-react 1

supp_hazards

Storage Class

4.2 - Pyrophoric and self-heating hazardous materials

wgk_germany

nwg

flash_point_f

No data available

flash_point_c

No data available

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


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