257222

Trimethylaluminum

97%

• Synonym(s): Aluminum trimethanide, TMA
• Linear Formula: (CH₃)₃Al
• CAS Number: 75-24-1
• Molecular Weight: 72.09
• Beilstein/REAXYS Number: 3587197
• EC Number: 200-853-0
• MDL number: MFCD00008252
• UNSPSC Code: 12352103
• PubChem Substance ID: 24855575
• NACRES: NA.23

Properties

• vapor pressure: 69.3 mmHg ( 60 °C)
• 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

Description

General description

Trimethylaluminum (TMA) is a widely used precursor in the chemical vapor deposition (CVD) process to produce thin films in various applications. TMA is highly reactive and pyrophoric, which makes it an effective source of aluminum in thin film deposition processes to improve optoelectronic properties, such as enhanced light absorption and carrier transport characteristics.

Application

Trimethylaluminum can be used:

• As a growth initiator to synthesize self-assembled aluminum nanoparticles via atomic layer deposition.
• As a precursor to synthesize aluminum-doped ZnO thin films(AZO) for electron transport layer of perovskite solar cells. TMA enhances electrical conductivity and thermal stability of perovskite layers.
• To fabricate Al₂O₃-coated Si-alloy anodes for Li-ion batteries. This coating helps to suppress the volume expansion of Si and improves cell stability.
• To fabricate Al₂O₃-coated graphite electrode with superior anti-self-discharging behavior (260 h) with long stability (900 cycles), for Al-ion battery.

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:

• Aldrich^® Sure/Pac^™ station for liquefied gases Z566446
• PTFE Sealing tape Z104388 or Z221880
• Straight septum-inlet adapter Z118141 with septa Z565687 or Z565695

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

Safety Information

• pictograms: GHS02,GHS05
• signalword: Danger
• hcodes: H250,H260,H314
• pcodes: P210 - P231 + P232 - P280 - P303 + P361 + P353 - P305 + P351 + P338 - P370 + P378
• Hazard Classifications: Eye Dam. 1 - Pyr. Liq. 1 - Skin Corr. 1B - Water-react 1
• supp_hazards: EUH014
• 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