Trimethylaluminium

Trimethylaluminium
	Al, C, H
Names
	IUPAC name Trimethylalumane
	Other names Trimethylaluminum; Aluminium trimethyl; Aluminum trimethyl; TMA; TMAl;
Identifiers
CAS Number	75-24-1 ;
3D model (JSmol)	dimer: Interactive image; monomer: Interactive image;
ChemSpider	10606585 ;
ECHA InfoCard	100.000.776
PubChem CID	16682925;
UNII	AV210LG46J ;
CompTox Dashboard (EPA)	DTXSID9058787 ;
	InChI InChI=1S/3CH3.Al/h31H3; Key: JLTRXTDYQLMHGR-UHFFFAOYSA-N ; InChI=1/3CH3.Al/h31H3;/rC3H9Al/c1-4(2)3/h1-3H3 Key: JLTRXTDYQLMHGR-MZZUXTGEAJ;
	SMILES dimer: C[Al-](C)([CH3+]1)[CH3+][Al-]1(C)C; monomer: C[Al](C)C;
Properties
Chemical formula	Al2(CH3)6
Molar mass	144.17 g/mol; 72.09 g/mol (Al(CH3)3)
Appearance	Colorless liquid
Density	0.752 g/cm3 (20 °C)
Melting point	15.4 °C (59.7 °F; 288.5 K)
Boiling point	125–130 °C (257–266 °F; 398–403 K)
Solubility in water	Reacts
Vapor pressure	1.2 kPa (20 °C); 9.24 kPa (60 °C);
Viscosity	1.12 cP (20 °C); 0.9 cP (30 °C);
Thermochemistry
Heat capacity (C)	155.6 J/(mol·K)
Std molar; entropy (S⦵298)	209.4 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−136.4 kJ/mol
Gibbs free energy (ΔfG⦵)	−9.9 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Pyrophoric, severe skin burns and eye damage
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H250, H260, H314
Precautionary statements	P222, P223, P231+P232, P280, P370+P378, P422
NFPA 704 (fire diamond)	3 4 3 W
Flash point	−17.0 °C (1.4 °F; 256.1 K)
Related compounds
Related compounds	Triethylaluminium; Trimethylborane; Trimethylgallium; Trimethylindium;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Trimethylaluminium or TMA is one of the simplest examples of an organoaluminium compound. Despite its name it has the formula Al₂(CH₃)₆ (abbreviated as Al₂Me₆, where Me stands for methyl), as it exists as a dimer. This colorless liquid is pyrophoric. It is an industrially important compound, closely related to triethylaluminium.

Names
Al, C, H

IUPAC name Trimethylalumane
Other names Trimethylaluminum Aluminium trimethyl Aluminum trimethyl TMA TMAl
Identifiers
CAS Number	75-24-1^Y
3D model (JSmol)	dimer: Interactive image monomer: Interactive image
ChemSpider	10606585^Y
ECHA InfoCard	100.000.776
PubChem CID	16682925
UNII	AV210LG46J^Y
CompTox Dashboard (EPA)	DTXSID9058787
InChI InChI=1S/3CH3.Al/h31H3;^Y Key: JLTRXTDYQLMHGR-UHFFFAOYSA-N^Y InChI=1/3CH3.Al/h31H3;/rC3H9Al/c1-4(2)3/h1-3H3 Key: JLTRXTDYQLMHGR-MZZUXTGEAJ
SMILES dimer: C[Al-](C)([CH3+]1)[CH3+][Al-]1(C)C monomer: C[Al](C)C
Properties
Chemical formula	Al₂(CH₃)₆
Molar mass	144.17 g/mol 72.09 g/mol (Al(CH₃)₃)
Appearance	Colorless liquid
Density	0.752 g/cm³ (20 °C)
Melting point	15.4 °C (59.7 °F; 288.5 K)
Boiling point	125–130 °C (257–266 °F; 398–403 K)
Solubility in water	Reacts
Vapor pressure	1.2 kPa (20 °C) 9.24 kPa (60 °C)
Viscosity	1.12 cP (20 °C) 0.9 cP (30 °C)
Thermochemistry
Heat capacity (C)	155.6 J/(mol·K)
Std molar entropy (S^⦵₂₉₈)	209.4 J/(mol·K)
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−136.4 kJ/mol
Gibbs free energy (Δ_fG^⦵)	−9.9 kJ/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Pyrophoric, severe skin burns and eye damage
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H250, H260, H314
Precautionary statements	P222, P223, P231+P232, P280, P370+P378, P422
NFPA 704 (fire diamond)	3 4 3 W
Flash point	−17.0 °C (1.4 °F; 256.1 K)
Related compounds
Related compounds	Triethylaluminium Trimethylborane Trimethylgallium Trimethylindium
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references