Chemical Properties of Urea, tetramethyl- (CAS 632-22-4)

InChI

InChI=1S/C5H12N2O/c1-6(2)5(8)7(3)4/h1-4H3

InChI Key

AVQQQNCBBIEMEU-UHFFFAOYSA-N

Formula

C5H12N2O

SMILES

CN(C)C(=O)N(C)C

Molecular Weight¹

116.16

CAS

632-22-4

Other Names

• ((CH3)2N)2CO
• 1,1,3,3-tetramethylurea
• N,N,N',N'-tetramethylurea
• NSC 91488
• TMU
• Temur
• Tetramethyluree
• Urea, N,N,N',N'-tetramethyl-
• tetramethylurea
• urea, 1,1,3,3-tetramethyl-
• urea, tetramethyl

• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (kJ/mol).
• Δ_cH°_liquid : Standard liquid enthalpy of combustion (kJ/mol).
• C_p,gas : Ideal gas heat capacity (J/mol×K).
• 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 standard conditions (kJ/mol).
• Δ_fusH : Enthalpy of fusion 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).
• log₁₀WS : Log10 of Water solubility in mol/l.
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• P_vap : Vapor pressure (kPa).
• n₀ : Refractive Index.
• ρ_l : Liquid Density (kg/m³).
• Δ_fusS : Entropy of fusion at a given temperature (J/mol×K).
• c_sound,fluid : Speed of sound in fluid (m/s).
• T_boil : Normal Boiling Point Temperature (K).
• T_fus : Normal melting (fusion) point (K).
• T_triple : Triple Point Temperature (K).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
PAff	930.60	kJ/mol	NIST
BasG	899.60	kJ/mol	NIST
ΔcH°liquid	-3420.36 ± 0.81	kJ/mol	NIST
ΔfH°gas	-205.60 ± 1.10	kJ/mol	NIST
ΔfH°liquid	-262.20 ± 1.10	kJ/mol	NIST
ΔfusH°	16.35	kJ/mol	Joback Calculated Property
ΔvapH°	56.60 ± 0.80	kJ/mol	NIST
IE	[8.64; 8.74]	eV
IE	8.74 ± 0.05	eV	NIST
IE	8.64	eV	NIST
IE	8.67	eV	NIST
log10WS	[0.94; 0.94]
log10WS	0.94		Aq. Solubility Prediction
log10WS	0.94		Estimated Solubility
logPoct/wat	0.230		Crippen Calculated Property
McVol	102.840	ml/mol	McGowan Calculated Property
Tboil	449.70	K	NIST
Tfus	[272.00; 272.20]	K
Tfus	272.05	K	Aq. Solubility Prediction
Tfus	272.20 ± 0.10	K	NIST
Tfus	272.00 ± 0.10	K	NIST
Ttriple	270.48 ± 0.02	K	NIST

Cheméo can also estimate Critical Temperature, Critical Pressure, Critical Volume, Standard Gibbs free energy of formation, Acentric Factor 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,gas	[195.50; 255.42]	J/mol×K	[392.75; 568.15]
Cp,gas	195.50	J/mol×K	392.75	Joback Calculated Property
Cp,gas	206.75	J/mol×K	421.98	Joback Calculated Property
Cp,gas	217.48	J/mol×K	451.22	Joback Calculated Property
Cp,gas	227.69	J/mol×K	480.45	Joback Calculated Property
Cp,gas	237.41	J/mol×K	509.68	Joback Calculated Property
Cp,gas	246.64	J/mol×K	538.92	Joback Calculated Property
Cp,gas	255.42	J/mol×K	568.15	Joback Calculated Property
Cp,liquid	241.20	J/mol×K	320.00	NIST
ΔfusH	[13.40; 14.00]	kJ/mol	[272.10; 272.20]
ΔfusH	14.00	kJ/mol	272.10	NIST
ΔfusH	13.40	kJ/mol	272.20	NIST
ΔfusH	13.40	kJ/mol	272.20	NIST
ΔfusH	13.40	kJ/mol	272.20	NIST
ΔfusH	13.40	kJ/mol	272.20	NIST
ΔvapH	[41.70; 52.20]	kJ/mol	[385.00; 385.00]
ΔvapH	41.70	kJ/mol	385.00	NIST
ΔvapH	52.20	kJ/mol	385.00	NIST
n0	[1.44910; 1.44940]		[298.15; 298.15]
n0	1.44910		298.15	Enthalpies of solution of N,N,N0,N0-tetramethylurea in amides, dimethylsulphoxide, and acetone at 298.15 K
n0	1.44940		298.15	Enthalpies of solution of tetramethyl-bis-urea (Mebicarum) in amides and acetone at 298.15 K
n0	1.44935		298.15	D2O-H2O solvent isotope effects on the enthalpy of 1,1,3,3-tetramethylurea hydration between 278.15 and 318.15 K
ρl	[934.35; 980.34]	kg/m3	[278.15; 328.15]
ρl	980.34	kg/m3	278.15	Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
ρl	971.23	kg/m3	288.15	Volume-related solvation and pair interaction parameters for dilute solutions of urea and tetramethylurea in ethylene glycol between 288.15 K and 328.15 K: A comparative analysis
ρl	971.22	kg/m3	288.15	Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
ρl	971.20	kg/m3	288.15	Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
ρl	967.00	kg/m3	293.15	Investigation of the Solubilities of Carbon Dioxide in Some Low Volatile Solvents and Their Thermodynamic Properties
ρl	962.07	kg/m3	298.15	Volume-related solvation and pair interaction parameters for dilute solutions of urea and tetramethylurea in ethylene glycol between 288.15 K and 328.15 K: A comparative analysis
ρl	962.05	kg/m3	298.15	Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
ρl	962.04	kg/m3	298.15	Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
ρl	952.84	kg/m3	308.15	Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
ρl	952.88	kg/m3	308.15	Volume-related solvation and pair interaction parameters for dilute solutions of urea and tetramethylurea in ethylene glycol between 288.15 K and 328.15 K: A comparative analysis
ρl	952.85	kg/m3	308.15	Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
ρl	943.62	kg/m3	318.15	Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
ρl	943.65	kg/m3	318.15	Volume-related solvation and pair interaction parameters for dilute solutions of urea and tetramethylurea in ethylene glycol between 288.15 K and 328.15 K: A comparative analysis
ρl	943.62	kg/m3	318.15	Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
ρl	934.38	kg/m3	328.15	Volume-related solvation and pair interaction parameters for dilute solutions of urea and tetramethylurea in ethylene glycol between 288.15 K and 328.15 K: A comparative analysis
ρl	934.35	kg/m3	328.15	Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
ΔfusS	[49.20; 49.20]	J/mol×K	[272.20; 272.20]
ΔfusS	49.20	J/mol×K	272.20	NIST
ΔfusS	49.20	J/mol×K	272.20	NIST
csound,fluid	[1355.31; 1432.53]	m/s	[288.15; 308.15]
csound,fluid	1432.53	m/s	288.15	Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl
csound,fluid	1413.44	m/s	293.15	Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl
csound,fluid	1397.60	m/s	298.15	Volumetric and compressibility properties of liquid water as a solute in glycolic, propylene carbonate, and tetramethylurea solutions at T = 298.15 K
csound,fluid	1393.92	m/s	298.15	Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl
csound,fluid	1374.53	m/s	303.15	Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl
csound,fluid	1355.31	m/s	308.15	Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[0.17; 202.64]	kPa	[293.85; 534.14]	The Yaws Handbook of Vapor Pressure
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.20526e+01
Coefficient B			-3.16454e+03
Coefficient C			-6.47090e+01
Temperature range, min.			293.85
Temperature range, max.			534.14
Pvap	0.17	kPa	293.85	Calculated Property
Pvap	0.73	kPa	320.55	Calculated Property
Pvap	2.34	kPa	347.25	Calculated Property
Pvap	6.17	kPa	373.95	Calculated Property
Pvap	13.91	kPa	400.65	Calculated Property
Pvap	27.83	kPa	427.34	Calculated Property
Pvap	50.63	kPa	454.04	Calculated Property
Pvap	85.30	kPa	480.74	Calculated Property
Pvap	134.95	kPa	507.44	Calculated Property
Pvap	202.64	kPa	534.14	Calculated Property

Similar Compounds

Find more compounds similar to Urea, tetramethyl-.

Mixtures

• Urea, tetramethyl- + Water
• Sulfur dioxide + Urea, tetramethyl-
• 1,2-Ethanediol + Urea, tetramethyl-
• sodium chloride + Urea, tetramethyl- + Water
• Carbon dioxide + Urea, tetramethyl-
• Urea, tetramethyl- + Formamide

Sources

• 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.
• Crippen Method
• Enthalpies of solution of 1,1,3,3-tetramethylurea in normal and branched alkanols (C2 C4) at 298.15 K
• Volumetric and compressibility properties of liquid water as a solute in glycolic, propylene carbonate, and tetramethylurea solutions at T = 298.15 K
• Enthalpies of solution of N,N,N0,N0-tetramethylurea in amides, dimethylsulphoxide, and acetone at 298.15 K
• Densimetric and ultrasonic characterization of urea and its derivatives in water
• Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl
• Solubility and thermodynamic properties of SO2 in three low volatile urea derivatives
• Enthalpies and heat capacities of solution of urea and tetramethylurea in water, ethylene glycol and formamide
• Volume-related solvation and pair interaction parameters for dilute solutions of urea and tetramethylurea in ethylene glycol between 288.15 K and 328.15 K: A comparative analysis
• Enthalpies of transfer of urea and methyl-substituted ureas from water to methanol at 298.15K
• Enthalpies of solution of tetramethyl-bis-urea (Mebicarum) in amides and acetone at 298.15 K
• Addendum to Effect of intramolecular cyclization on the enthalpies of solvation of tetramethylurea in water and alkanols at 298.15 K [Thermochim. Acta 475 (2008) 72-75]
• D2O-H2O solvent isotope effects on the enthalpy of 1,1,3,3-tetramethylurea hydration between 278.15 and 318.15 K
• Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
• Enthalpy-related interaction parameters in H/D isotopically distinguishable aqueous solutions of tetramethylurea cyclic derivatives at 298.15 K
• Investigation of the Solubilities of Carbon Dioxide in Some Low Volatile Solvents and Their Thermodynamic Properties
• Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
• Thermal Expansion and Structure of 1,3-Dimethylurea, Tetramethylurea, and Tetrabutylammonium Bromide Aqueous Solutions Derived from Density Measurements
• Hydrophobic-Hydrophilic Solvation of Variously Substituted N-Alkylureas in Aqueous Solution: A Calorimetric Study at a Temperature of 298.15 K
• Standard Enthalpies and Heat Capacities of Solution of Urea and Tetramethylurea in Water
• Joback Method
• Aqueous Solubility Prediction Method
• Estimated Solubility Method
• McGowan Method
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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