Chemical Properties of Trimethylaluminum (CAS 75-24-1)

InChI

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

InChI Key

JLTRXTDYQLMHGR-UHFFFAOYSA-N

Formula

C3H9Al

SMILES

[Al].[CH3].[CH3].[CH3]

Molecular Weight¹

72.09

CAS

75-24-1

Other Names

• (CH3)3Al
• Aluminum, trimethyl-
• Trimethylalane
• Trimethylaluminium
• UN 1103

• Δ_cH°_liquid : Standard liquid enthalpy of combustion (kJ/mol).
• C_p,liquid : Liquid phase heat capacity (J/mol×K).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fH°_liquid : Liquid phase enthalpy of formation at standard conditions (kJ/mol).
• Δ_fusH : Enthalpy of fusion at a given temperature (kJ/mol).
• Δ_subH : Enthalpy of sublimation at a given temperature (kJ/mol).
• Δ_vapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
• Δ_vapH : Enthalpy of vaporization at a given temperature (kJ/mol).
• IE : Ionization energy (eV).
• P_vap : Vapor pressure (kPa).
• ρ_g : Gas Density (kg/m³).
• ρ_l : Liquid Density (kg/m³).
• Δ_fusS : Entropy of fusion at a given temperature (J/mol×K).
• S°_liquid : Liquid phase molar entropy at standard conditions (J/mol×K).
• T_boil : Normal Boiling Point Temperature (K).
• T_triple : Triple Point Temperature (K).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ΔcH°liquid	-3184.40 ± 9.60	kJ/mol	NIST
ΔfH°gas	[-88.70; -57.00]	kJ/mol
ΔfH°gas	-86.50 ± 4.80	kJ/mol	NIST
ΔfH°gas	-57.00 ± 9.70	kJ/mol	NIST
ΔfH°gas	-88.70	kJ/mol	NIST
ΔfH°liquid	[-151.90; -120.20]	kJ/mol
ΔfH°liquid	-149.70 ± 4.50	kJ/mol	NIST
ΔfH°liquid	-120.20 ± 9.60	kJ/mol	NIST
ΔfH°liquid	-151.90	kJ/mol	NIST
ΔvapH°	[63.20; 63.20]	kJ/mol
ΔvapH°	63.20 ± 1.70	kJ/mol	NIST
ΔvapH°	63.20 ± 1.70	kJ/mol	NIST
IE	[9.09; 9.76]	eV
IE	9.09 ± 0.26	eV	NIST
IE	9.76	eV	NIST
S°liquid	209.41	J/mol×K	NIST
Tboil	400.27	K	Air Liquide Gas Encyclopedia
Ttriple	[288.43; 288.43]	K
Ttriple	288.43 ± 0.02	K	NIST
Ttriple	288.43 ± 0.02	K	NIST

Cheméo can also estimate Normal melting (fusion) point, Critical Temperature, Critical Pressure, Critical Volume, Standard Gibbs free energy of formation, Acentric Factor, Log10 of Water solubility in mol/l for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,liquid	155.60	J/mol×K	298.15	NIST
ΔfusH	[8.79; 8.79]	kJ/mol	[288.40; 288.43]
ΔfusH	8.79	kJ/mol	288.40	NIST
ΔfusH	8.79	kJ/mol	288.40	NIST
ΔfusH	8.79	kJ/mol	288.43	NIST
ΔfusH	8.79	kJ/mol	288.43	NIST
ΔsubH	60.10	kJ/mol	264.00	NIST
ΔvapH	[39.80; 43.00]	kJ/mol	[290.50; 400.27]
ΔvapH	43.00	kJ/mol	290.50	NIST
ΔvapH	39.80	kJ/mol	368.00	NIST
ΔvapH	39.80	kJ/mol	368.00	NIST
ΔvapH	41.84	kJ/mol	400.27	Air Liquide Gas Encyclopedia
ρg	3.05	kg/m3	288.15	Air Liquide Gas Encyclopedia
ρl	725.00	kg/m3	400.27	Air Liquide Gas Encyclopedia
ΔfusS	[30.48; 30.48]	J/mol×K	[288.43; 288.43]
ΔfusS	30.48	J/mol×K	288.43	NIST
ΔfusS	30.48	J/mol×K	288.43	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[10.89; 101.28]	kPa	[336.96; 400.27]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.53809e+01
Coefficient B			-3.97019e+03
Coefficient C			-3.13980e+01
Reference			McCullough, Messerly, et al., 1963
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			336.96
Temperature range, max.			400.27
Pvap	10.89	kPa	336.96	Calculated Property
Pvap	14.59	kPa	343.99	Calculated Property
Pvap	19.29	kPa	351.03	Calculated Property
Pvap	25.21	kPa	358.06	Calculated Property
Pvap	32.57	kPa	365.10	Calculated Property
Pvap	41.64	kPa	372.13	Calculated Property
Pvap	52.71	kPa	379.17	Calculated Property
Pvap	66.09	kPa	386.20	Calculated Property
Pvap	82.15	kPa	393.24	Calculated Property
Pvap	101.28	kPa	400.27	Calculated Property
Pvap	[10.89; 101.28]	kPa	[336.96; 400.27]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.53809e+01
Coefficient B			-3.97019e+03
Coefficient C			-3.13980e+01
Reference			McCullough, Messerly, et al., 1963, 2
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			336.96
Temperature range, max.			400.27
Pvap	10.89	kPa	336.96	Calculated Property
Pvap	14.59	kPa	343.99	Calculated Property
Pvap	19.29	kPa	351.03	Calculated Property
Pvap	25.21	kPa	358.06	Calculated Property
Pvap	32.57	kPa	365.10	Calculated Property
Pvap	41.64	kPa	372.13	Calculated Property
Pvap	52.71	kPa	379.17	Calculated Property
Pvap	66.09	kPa	386.20	Calculated Property
Pvap	82.15	kPa	393.24	Calculated Property
Pvap	101.28	kPa	400.27	Calculated Property

Similar Compounds

Find more compounds similar to Trimethylaluminum.

Sources

• Air Liquide Gas Encyclopedia
• Cheméo Relay (1.0, beta) Beta: served but experimental, data-limited and below our cross-validation release bar; the Joback value is recommended where available.
• NIST Webbook

Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more. Take the time to validate and double check the source of the data.
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