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Sigma-Aldrich

Trimethylaluminum

97%

Synonym(s):
Aluminum trimethanide, TMA
Linear Formula:
(CH3)3Al
CAS Number:
Molecular Weight:
72.09
Beilstein:
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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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.
[40][41]
  • Al4C3 layers have been grown on Al2O3 (0001) using TMA and methane as source materials for aluminum and carbon.
  • [42]

    Packaging

    100 g in Sure-Pac™

    Other Notes

    Storage below 20°C may cause crystallization.

    Recommended products

    Angled septum-inlet adapter Z118206 or straight septum-inlet adapter, 6mm I.D. inlet, Z118141 or straight septum-inlet adapter, 13mm I.D. inlet, Z118192 is recommended.

    Pictograms

    FlameCorrosion

    Signal Word

    Danger

    Hazard Statements

    Hazard Classifications

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

    Supplementary Hazards

    Storage Class Code

    4.2 - Pyrophoric and self-heating hazardous materials

    WGK

    nwg

    Flash Point(F)

    No data available

    Flash Point(C)

    No data available

    Personal Protective Equipment

    dust mask type N95 (US), Eyeshields, Gloves

    Certificate of Analysis

    Enter Lot Number to search for Certificate of Analysis (COA).

    Certificate of Origin

    Enter Lot Number to search for Certificate of Origin (COO).

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