Chemical Properties of Cyclooctadecane (CAS 296-18-4)

InChI

InChI=1S/C18H36/c1-2-4-6-8-10-12-14-16-18-17-15-13-11-9-7-5-3-1/h1-18H2

InChI Key

JNFIMRWCDIOUMT-UHFFFAOYSA-N

Formula

C18H36

SMILES

C1CCCCCCCCCCCCCCCCC1

Molecular Weight¹

252.48

CAS

296-18-4

• C_p,gas : Ideal gas heat capacity (J/mol×K).
• η : Dynamic viscosity (Pa×s).
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : 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).
• log₁₀WS : Log10 of Water solubility in mol/l.
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• P_c : Critical Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• Δ_fusS : Entropy of fusion at a given temperature (J/mol×K).
• 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

Property	Value	Unit	Source
ΔfG°	-12.36	kJ/mol	Joback Calculated Property
ΔfH°gas	-414.11	kJ/mol	Joback Calculated Property
ΔfusH°	7.94	kJ/mol	Joback Calculated Property
ΔvapH°	58.46	kJ/mol	Joback Calculated Property
log10WS	-7.25		Crippen Calculated Property
logPoct/wat	7.022		Crippen Calculated Property
McVol	253.620	ml/mol	McGowan Calculated Property
Pc	1724.59	kPa	Joback Calculated Property
Tboil	686.70	K	Joback Calculated Property
Tc	946.78	K	Joback Calculated Property
Tfus	[345.00; 346.00]	K
Tfus	346.00 ± 2.00	K	NIST
Tfus	346.00 ± 3.00	K	NIST
Tfus	345.00 ± 3.00	K	NIST
Vc	0.881	m3/kmol	Joback Calculated Property

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[762.84; 928.03]	J/mol×K	[686.70; 946.78]
Cp,gas	762.84	J/mol×K	686.70	Joback Calculated Property
Cp,gas	798.02	J/mol×K	730.05	Joback Calculated Property
Cp,gas	830.21	J/mol×K	773.39	Joback Calculated Property
Cp,gas	859.37	J/mol×K	816.74	Joback Calculated Property
Cp,gas	885.43	J/mol×K	860.09	Joback Calculated Property
Cp,gas	908.34	J/mol×K	903.43	Joback Calculated Property
Cp,gas	928.03	J/mol×K	946.78	Joback Calculated Property
η	[0.0000026; 0.3047131]	Pa×s	[262.00; 686.70]
η	0.3047131	Pa×s	262.00	Joback Calculated Property
η	0.0055331	Pa×s	332.78	Joback Calculated Property
η	0.0004100	Pa×s	403.57	Joback Calculated Property
η	0.0000660	Pa×s	474.35	Joback Calculated Property
η	0.0000171	Pa×s	545.13	Joback Calculated Property
η	0.0000060	Pa×s	615.92	Joback Calculated Property
η	0.0000026	Pa×s	686.70	Joback Calculated Property
ΔfusH	[9.87; 9.87]	kJ/mol	[346.00; 346.20]
ΔfusH	9.87	kJ/mol	346.00	NIST
ΔfusH	9.87	kJ/mol	346.20	NIST
ΔfusS	28.40	J/mol×K	346.00	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.33; 202.63]	kPa	[433.52; 648.41]	The Yaw...
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.32047e+01
Coefficient B			-4.36112e+03
Coefficient C			-9.59000e+01
Temperature range, min.			433.52
Temperature range, max.			648.41
Pvap	1.33	kPa	433.52	Calculated Property
Pvap	3.13	kPa	457.40	Calculated Property
Pvap	6.61	kPa	481.27	Calculated Property
Pvap	12.79	kPa	505.15	Calculated Property
Pvap	23.01	kPa	529.03	Calculated Property
Pvap	38.93	kPa	552.90	Calculated Property
Pvap	62.53	kPa	576.78	Calculated Property
Pvap	96.03	kPa	600.66	Calculated Property
Pvap	141.87	kPa	624.53	Calculated Property
Pvap	202.63	kPa	648.41	Calculated Property

Similar Compounds

Find more compounds similar to Cyclooctadecane.

Sources

• Crippen Method
• Crippen Method
• Joback Method
• McGowan Method
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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