Chemical Properties of Disiloxane, hexamethyl- (CAS 107-46-0)

InChI

InChI=1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3

InChI Key

UQEAIHBTYFGYIE-UHFFFAOYSA-N

Formula

C6H18OSi2

SMILES

C[Si](C)(C)O[Si](C)(C)C

Molecular Weight¹

162.38

CAS

107-46-0

Other Names

• ((CH3)3Si)2O
• 1,1,1,3,3,3-hexamethyldisiloxane
• Belsil DM 0.65
• Bis(trimethylsilyl) ether
• Bis(trimethylsilyl) oxide
• Disiloxane, 1,1,1,3,3,3-hexamethyl-
• Dow corning 200/0.65
• Fluka AG
• H7310
• HMDS (hexamethyldisiloxane)
• HMDSO
• Hexamethyl disiloxane
• KF 96L
• NSC 43346
• OS 10
• Oxybis(trimethylsilane)
• SWS-F 221
• Silane, oxybis(trimethyl)-
• hexamethyldisiloxane

• ω : Acentric Factor.
• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (kJ/mol).
• C_p,liquid : Liquid phase heat capacity (J/mol×K).
• Δ_fusH : Enthalpy of fusion at a given temperature (kJ/mol).
• Δ_vapH : Enthalpy of vaporization at a given temperature (kJ/mol).
• IE : Ionization energy (eV).
• logP_oct/wat : Octanol/Water partition coefficient.
• P_c : Critical Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• n₀ : Refractive Index.
• ρ_l : Liquid Density (kg/m³).
• I_np : Non-polar retention indices.
• Δ_fusS : Entropy of fusion at a given temperature (J/mol×K).
• S°_liquid : Liquid phase molar entropy at standard conditions (J/mol×K).
• γ : Surface Tension (N/m).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• T_fus : Normal melting (fusion) point (K).
• T_triple : Triple Point Temperature (K).
• V_c : Critical Volume (m³/kmol).
• V_m : Molar Volume (m³/mol).
• Z_c : Critical Compressibility.
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.4145		PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
PAff	846.40	kJ/mol	NIST
BasG	816.20	kJ/mol	NIST
IE	[9.59; 9.88]	eV
IE	9.60 ± 1.00	eV	NIST
IE	9.64 ± 0.01	eV	NIST
IE	9.59 ± 0.04	eV	NIST
IE	9.88	eV	NIST
logPoct/wat	2.673		Crippen Calculated Property
Pc	[1909.98; 1925.00]	kPa
Pc	1920.00	kPa	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Pc	1909.98	kPa	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Pc	1925.00 ± 10.00	kPa	NIST
Inp	[597.40; 646.00]
Inp	597.40		NIST
Inp	597.40		NIST
Inp	598.00		NIST
Inp	645.00		NIST
Inp	646.00		NIST
S°liquid	[433.80; 433.84]	J/mol×K
S°liquid	433.80	J/mol×K	NIST
S°liquid	433.84	J/mol×K	NIST
Tboil	[372.00; 375.00]	K
Tboil	374.12	K	Isobaric Vapor-Liquid Equilibrium Data for the Acetone + Hexamethyl Disiloxane + Ethyl Acetate Ternary System at 101.3 kPa: Determination and Correlation
Tboil	374.00	K	NIST
Tboil	372.50 ± 0.50	K	NIST
Tboil	374.14 ± 0.30	K	NIST
Tboil	373.20 ± 1.50	K	NIST
Tboil	375.00 ± 3.00	K	NIST
Tboil	373.00 ± 3.00	K	NIST
Tboil	372.00 ± 3.00	K	NIST
Tc	[516.60; 518.70]	K
Tc	518.00	K	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Tc	516.60	K	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tc	518.70 ± 0.51	K	NIST
Tfus	207.15	K	Jean-Claude Bradley Open Melting Point Dataset (2014, CC0) Compiled value
Ttriple	[204.93; 204.94]	K
Ttriple	204.94	K	Staveley, Lobo and Calado (1981), triple points Compiled value
Ttriple	204.93 ± 0.02	K	NIST
Ttriple	204.93 ± 0.02	K	NIST
Vc	[0.590; 0.620]	m3/kmol
Vc	0.590	m3/kmol	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Vc	0.620	m3/kmol	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Vm	2.14e-04	m3/mol	Thermodynamic Study of Heptane + Silicone Mixtures. Excess Volumes and Enthalpies at 298.15 K
Zc	0.2630000		IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value

Cheméo can also estimate Enthalpy of formation at standard conditions, Enthalpy of vaporization at standard conditions, Standard Gibbs free energy of formation, 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	[311.37; 311.40]	J/mol×K	[298.15; 298.15]
Cp,liquid	311.40	J/mol×K	298.15	NIST
Cp,liquid	311.37	J/mol×K	298.15	NIST
ΔfusH	[11.92; 11.92]	kJ/mol	[204.90; 204.93]
ΔfusH	11.92	kJ/mol	204.90	NIST
ΔfusH	11.92	kJ/mol	204.90	NIST
ΔfusH	11.92	kJ/mol	204.93	NIST
ΔfusH	11.92	kJ/mol	204.93	NIST
ΔfusH	11.92	kJ/mol	204.93	NIST
ΔvapH	[31.30; 36.90]	kJ/mol	[327.00; 373.00]
ΔvapH	33.10	kJ/mol	327.00	NIST
ΔvapH	34.60 ± 0.10	kJ/mol	332.00	NIST
ΔvapH	34.60 ± 0.10	kJ/mol	332.00	NIST
ΔvapH	36.90	kJ/mol	341.50	NIST
ΔvapH	33.10 ± 0.10	kJ/mol	351.00	NIST
ΔvapH	33.10 ± 0.10	kJ/mol	351.00	NIST
ΔvapH	36.00	kJ/mol	360.00	NIST
ΔvapH	36.00	kJ/mol	360.00	NIST
ΔvapH	31.30 ± 0.10	kJ/mol	373.00	NIST
ΔvapH	31.30 ± 0.10	kJ/mol	373.00	NIST
Pvap	101.30	kPa	374.12	Isobaric Vapor-Liquid Equilibrium Data for the Acetone + Hexamethyl Disiloxane + Ethyl Acetate Ternary System at 101.3 kPa: Determination and Correlation
n0	1.37370		298.15	Determination and Correlation of Vapor Liquid Equilibrium Data for the Ethyl Acetate + Hexamethyl Disiloxane System at 101.3 kPa
ρl	[726.05; 763.87]	kg/m3	[293.15; 328.15]
ρl	763.87	kg/m3	293.15	The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
ρl	747.95	kg/m3	308.15	The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
ρl	742.53	kg/m3	313.15	The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
ρl	737.07	kg/m3	318.15	The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
ρl	731.57	kg/m3	323.15	The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
ρl	726.05	kg/m3	328.15	The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
ΔfusS	[58.18; 58.18]	J/mol×K	[204.93; 204.93]
ΔfusS	58.18	J/mol×K	204.93	NIST
ΔfusS	58.18	J/mol×K	204.93	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.33; 202.64]	kPa	[273.82; 398.55]	The Yaws Handbook of Vapor Pressure
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.40019e+01
Coefficient B			-2.95909e+03
Coefficient C			-5.80520e+01
Temperature range, min.			273.82
Temperature range, max.			398.55
Pvap	1.33	kPa	273.82	Calculated Property
Pvap	3.05	kPa	287.68	Calculated Property
Pvap	6.35	kPa	301.54	Calculated Property
Pvap	12.22	kPa	315.40	Calculated Property
Pvap	22.00	kPa	329.26	Calculated Property
Pvap	37.39	kPa	343.11	Calculated Property
Pvap	60.50	kPa	356.97	Calculated Property
Pvap	93.81	kPa	370.83	Calculated Property
Pvap	140.15	kPa	384.69	Calculated Property
Pvap	202.64	kPa	398.55	Calculated Property
Pvap	[9.61; 270.00]	kPa	[309.40; 411.56]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.35898e+01
Coefficient B			-2.77212e+03
Coefficient C			-6.46730e+01
Reference			Scott, Messerly, et al., 1961
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			309.40
Temperature range, max.			411.56
Pvap	9.61	kPa	309.40	Calculated Property
Pvap	15.87	kPa	320.75	Calculated Property
Pvap	25.13	kPa	332.10	Calculated Property
Pvap	38.32	kPa	343.45	Calculated Property
Pvap	56.55	kPa	354.80	Calculated Property
Pvap	81.03	kPa	366.16	Calculated Property
Pvap	113.13	kPa	377.51	Calculated Property
Pvap	154.28	kPa	388.86	Calculated Property
Pvap	206.04	kPa	400.21	Calculated Property
Pvap	270.00	kPa	411.56	Calculated Property
Pvap	[9.61; 270.00]	kPa	[309.40; 411.56]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.35898e+01
Coefficient B			-2.77212e+03
Coefficient C			-6.46730e+01
Reference			Scott, Messerly, et al., 1961, 2
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			309.40
Temperature range, max.			411.56
Pvap	9.61	kPa	309.40	Calculated Property
Pvap	15.87	kPa	320.75	Calculated Property
Pvap	25.13	kPa	332.10	Calculated Property
Pvap	38.32	kPa	343.45	Calculated Property
Pvap	56.55	kPa	354.80	Calculated Property
Pvap	81.03	kPa	366.16	Calculated Property
Pvap	113.13	kPa	377.51	Calculated Property
Pvap	154.28	kPa	388.86	Calculated Property
Pvap	206.04	kPa	400.21	Calculated Property
Pvap	270.00	kPa	411.56	Calculated Property

Property	Value	Unit	Temperature (K)	Source
γ	[0.02; 0.01]	N/m	[206.15; 374.15]	Jasper (1972), surface tension of pure liquid compounds Compiled value
Equation			Y = A + B·T + C·T² + D·T³ + E·T⁴ Y is γ in N/m, T in K
Coefficient A			3.78513e-02
Coefficient B			-7.63000e-05
Coefficient C			0.00000e+00
Coefficient D			0.00000e+00
Coefficient E			0.00000e+00
Temperature range, min.			206.15
Temperature range, max.			374.15
γ	0.02	N/m	206.15	Calculated Property
γ	0.02	N/m	224.82	Calculated Property
γ	0.02	N/m	243.48	Calculated Property
γ	0.02	N/m	262.15	Calculated Property
γ	0.02	N/m	280.82	Calculated Property
γ	0.02	N/m	299.48	Calculated Property
γ	0.01	N/m	318.15	Calculated Property
γ	0.01	N/m	336.82	Calculated Property
γ	0.01	N/m	355.48	Calculated Property
γ	0.01	N/m	374.15	Calculated Property

Similar Compounds

Find more compounds similar to Disiloxane, hexamethyl-.

Mixtures

• Disiloxane, hexamethyl- + 2,4,6-trimethyl-2,4,6-tris(3,3,3-trifluoropropyl)-1,3,5,2,4,6-trioxatrisilinane
• Disiloxane, hexamethyl- + Heptane
• Disiloxane, hexamethyl- + Isopropyl acetate
• Disiloxane, hexamethyl- + Acetone
• Disiloxane, hexamethyl- + Acetone + Ethyl Acetate
• Disiloxane, hexamethyl- + Trisiloxane, octamethyl-
• Disiloxane, hexamethyl- + Tetrasiloxane, decamethyl-
• Disiloxane, hexamethyl- + Pentasiloxane, dodecamethyl-
• Disiloxane, hexamethyl- + Ethyl Acetate

Sources

• Jean-Claude Bradley Open Melting Point Dataset (2014, CC0) ChEDL chemicals 1.5.2, from Bradley, J.-C.; Williams, A.; Lang, A. Jean-Claude Bradley Open Melting Point Dataset. Figshare, 2014 (CC0).
• IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 ChEDL chemicals 1.5.2, from Ambrose, D.; Tsonopoulos, C.; Nikitin, E. D. Vapor-Liquid Critical Properties of Elements and Compounds. 11. Organic Compounds Containing B + O; Halogens + N, + O, + O + S, + S, + Si; N + O; and O + S, + Si. J. Chem. Eng. Data 2009, 54, 669-689.
• Jasper (1972), surface tension of pure liquid compounds ChEDL chemicals 1.5.2, from Jasper, J. J. The Surface Tension of Pure Liquid Compounds. J. Phys. Chem. Ref. Data 1972, 1, 841-1010 (as transcribed in Lange's Handbook).
• PSRK revision IV (2005), critical constants and acentric factors of 1000 components ChEDL chemicals 1.5.2, from Horstmann, S.; Jabłoniec, A.; Krafczyk, J.; Fischer, K.; Gmehling, J. PSRK Group Contribution Equation of State: Comprehensive Revision and Extension IV, Including Critical Constants and α-Function Parameters for 1000 Components. Fluid Phase Equilib. 2005, 227, 157-164.
• Staveley, Lobo and Calado (1981), triple points ChEDL chemicals 1.5.2, from Staveley, L. A. K.; Lobo, L. Q.; Calado, J. C. G. Triple-Points of Low Melting Substances and Their Use in Cryogenic Work. Cryogenics 1981, 21, 131-144.
• Crippen Method
• Crippen Method
• The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
• Bubble-Point Measurements and Modeling of Binary Mixtures of Linear Siloxanes
• Isobaric Vapor-Liquid Equilibrium Data for the Acetone + Hexamethyl Disiloxane + Ethyl Acetate Ternary System at 101.3 kPa: Determination and Correlation
• Thermodynamic Study of Heptane + Silicone Mixtures. Excess Volumes and Enthalpies at 298.15 K
• Determination and Correlation of Vapor Liquid Equilibrium Data for the Ethyl Acetate + Hexamethyl Disiloxane System at 101.3 kPa
• Octanol/Air Partition Coefficients of Volatile Methylsiloxanes and Their Temperature Dependence
• Isobaric Vapor Liquid Equilibrium for the Binary System of Hexamethyl Disiloxane + Isopropyl Acetate at Atmospheric Pressure
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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