Chemical Properties of Heptasiloxane, hexadecamethyl- (CAS 541-01-5)

InChI

InChI=1S/C16H48O6Si7/c1-23(2,3)17-25(7,8)19-27(11,12)21-29(15,16)22-28(13,14)20-26(9,10)18-24(4,5)6/h1-16H3

InChI Key

NFVSFLUJRHRSJG-UHFFFAOYSA-N

Formula

C16H48O6Si7

SMILES

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

Molecular Weight¹

533.15

CAS

541-01-5

Other Names

• Hexadecamethylheptasiloxane

• ω : Acentric Factor.
• 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).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• T_fus : Normal melting (fusion) point (K).
• V_c : Critical Volume (m³/kmol).
• Z_c : Critical Compressibility.
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.8827		PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
IE	10.26	eV	Relay (1.0) Calculated Property
logPoct/wat	6.265		Crippen Calculated Property
Pc	[676.85; 700.00]	kPa
Pc	700.00	kPa	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Pc	676.85	kPa	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tboil	536.96	K	Relay (1.0) Calculated Property
Tc	[671.50; 671.80]	K
Tc	671.50	K	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Tc	671.80	K	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tfus	195.15	K	Jean-Claude Bradley Open Melting Point Dataset (2014, CC0) Compiled value
Vc	[2.051; 2.133]	m3/kmol
Vc	2.051	m3/kmol	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Vc	2.133	m3/kmol	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Zc	0.2570000		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
ΔvapH	[60.80; 63.80]	kJ/mol	[455.50; 497.00]
ΔvapH	63.80	kJ/mol	455.50	NIST
ΔvapH	60.80	kJ/mol	497.00	NIST
Pvap	[3.59e-03; 2.64]	kPa	[338.15; 438.15]
Pvap	3.59e-03	kPa	338.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	8.23e-03	kPa	348.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.02	kPa	358.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.04	kPa	368.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.08	kPa	378.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.15	kPa	388.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.28	kPa	398.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.51	kPa	408.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.91	kPa	418.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	1.57	kPa	428.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	2.64	kPa	438.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers

Similar Compounds

Find more compounds similar to Heptasiloxane, hexadecamethyl-.

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.
• 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.
• Cheméo Relay (1.0)
• 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
• Crippen Method
• Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
• NIST Webbook

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