Chemical Properties of Eicosamethylnonasiloxane (CAS 2652-13-3)

InChI

InChI=1S/C20H60O8Si9/c1-29(2,3)21-31(7,8)23-33(11,12)25-35(15,16)27-37(19,20)28-36(17,18)26-34(13,14)24-32(9,10)22-30(4,5)6/h1-20H3

InChI Key

XVNZQBSRKFXKSM-UHFFFAOYSA-N

Formula

C20H60O8Si9

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

Molecular Weight¹

681.46

CAS

2652-13-3

Other Names

• 1,1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,17-eicosamethylnonasiloxane
• icosamethylnonasiloxane

• ω : Acentric Factor.
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (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.
• 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).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
ΔvapH	85.90	kJ/mol	499.00	NIST
Pvap	[4.16e-04; 0.53]	kPa	[348.15; 438.15]
Pvap	4.16e-04	kPa	348.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	1.10e-03	kPa	358.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	2.75e-03	kPa	368.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	6.57e-03	kPa	378.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.01	kPa	388.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.03	kPa	398.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.07	kPa	408.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.14	kPa	418.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.28	kPa	428.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
Pvap	0.53	kPa	438.15	Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.33; 202.65]	kPa	[462.22; 606.43]	The Yaws Handbook of Vapor Pressure
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.92650e+01
Coefficient B			-7.60095e+03
Coefficient C			-6.16940e+01
Temperature range, min.			462.22
Temperature range, max.			606.43
Pvap	1.33	kPa	462.22	Calculated Property
Pvap	2.77	kPa	478.24	Calculated Property
Pvap	5.44	kPa	494.27	Calculated Property
Pvap	10.19	kPa	510.29	Calculated Property
Pvap	18.27	kPa	526.31	Calculated Property
Pvap	31.53	kPa	542.34	Calculated Property
Pvap	52.51	kPa	558.36	Calculated Property
Pvap	84.72	kPa	574.38	Calculated Property
Pvap	132.77	kPa	590.41	Calculated Property
Pvap	202.65	kPa	606.43	Calculated Property

Similar Compounds

Find more compounds similar to Eicosamethylnonasiloxane.

Sources

• 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
• The Yaws Handbook of Vapor Pressure

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