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
• KF 96L
• NSC 43346
• OS 10
• Oxybis(trimethylsilane)
• SWS-F 221
• Silane, oxybis(trimethyl)-
• hexamethyldisiloxane

• 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).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• T_triple : Triple Point Temperature (K).
• V_m : Molar Volume (m³/mol).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
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	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	518.70 ± 0.51	K	NIST
Ttriple	[204.93; 204.93]	K
Ttriple	204.93 ± 0.02	K	NIST
Ttriple	204.93 ± 0.02	K	NIST
Vm	2.14e-04	m3/mol	Thermodynamic Study of Heptane + Silicone Mixtures. Excess Volumes and Enthalpies at 298.15 K

Cheméo can also estimate Normal melting (fusion) point, Critical Volume, Enthalpy of formation at standard conditions, Enthalpy of vaporization at standard conditions, 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	[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(Pvp) = A + B/(T + C)
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

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

• 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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