Chemical Properties of Ethylene oxide (CAS 75-21-8)

InChI

InChI=1S/C2H4O/c1-2-3-1/h1-2H2

InChI Key

IAYPIBMASNFSPL-UHFFFAOYSA-N

Formula

C2H4O

SMILES

C1CO1

Molecular Weight¹

44.05

CAS

75-21-8

Other Names

• 1,2-Epoxyaethan
• 1,2-Epoxyethane
• Aethylenoxid
• Amprolene
• Anprolene
• Anproline
• DIHYDROOXIRENE
• DIMETHYLENE OXIDE
• E.O.
• ENT-26263
• ETO
• Epoxyethane
• Ethene oxide
• Ethyleenoxide
• Etylenu tlenek
• FEMA No. 2433
• Merpol
• NCI-C50088
• OXIRANE
• Oxacyclopropane
• Oxane
• Oxidoethane
• Oxiraan
• Oxiran
• Oxirene, dihydro-
• Oxyfume
• Oxyfume 12
• Qazi-ketcham
• Rcra waste number U115
• Sterilizing gas ethylene oxide 100%
• T-Gas
• UN 1040
• «alpha»,«beta»-Oxidoethane
• «alpha»,«beta»-Oxidoethane

• ω : Acentric Factor.
• PAff : Proton affinity (kJ/mol).
• T_ig : Autoignition Temperature (K).
• BasG : Gas basicity (kJ/mol).
• Δ_cH°_gas : Standard gas enthalpy of combustion (kJ/mol).
• Δ_cH°_liquid : Standard liquid enthalpy of combustion (kJ/mol).
• C_p,gas : Ideal gas heat capacity (J/mol×K).
• C_p,liquid : Liquid phase heat capacity (J/mol×K).
• μ : Dipole Moment (debye).
• η : Dynamic viscosity (Pa×s).
• LFL : Lower Flammability Limit (% in Air).
• UFL : Upper Flammability Limit (% in Air).
• T_flash,cc : Flash Point (Closed Cup Method) (K).
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fH°_liquid : Liquid phase 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).
• 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.
• McVol : McGowan's characteristic volume (ml/mol).
• NFPA Fire : NFPA Fire Rating.
• NFPA Health : NFPA Health Rating.
• P_c : Critical Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• ρ_c : Critical density (kg/m³).
• ρ_l : Liquid Density (kg/m³).
• I_np : Non-polar retention indices.
• I : 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).
• Δ_vapS : Entropy of vaporization 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).
• T_triple : Triple Point Temperature (K).
• V_c : Critical Volume (m³/kmol).
• Z_c : Critical Compressibility.
• Z_ra : Rackett Parameter.
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.2020		KDB
PAff	774.20	kJ/mol	NIST
Tig	702.04	K	KDB
BasG	745.30	kJ/mol	NIST
ΔcH°gas	[-1307.70; -1306.00]	kJ/mol
ΔcH°gas	-1306.00 ± 0.59	kJ/mol	NIST
ΔcH°gas	-1307.70 ± 0.84	kJ/mol	NIST
ΔcH°liquid	-1262.90 ± 1.30	kJ/mol	NIST
μ	1.90	debye	KDB
LFL	3.00	% in Air	KDB
UFL	100.00	% in Air	KDB
Tflash,cc	255.37	K	KDB
ΔfG°	-13.10	kJ/mol	KDB
ΔfH°gas	[-70.20; -52.63]	kJ/mol
ΔfH°gas	-52.67	kJ/mol	KDB
ΔfH°gas	-52.63 ± 0.63	kJ/mol	NIST
ΔfH°gas	-70.20	kJ/mol	NIST
ΔfH°liquid	-95.70 ± 1.30	kJ/mol	NIST
ΔfusH°	5.98	kJ/mol	Joback Calculated Property
ΔvapH°	[25.51; 25.90]	kJ/mol
ΔvapH°	25.51	kJ/mol	NIST
ΔvapH°	25.90	kJ/mol	NIST
IE	[10.15; 10.60]	eV
IE	10.56 ± 0.01	eV	NIST
IE	Outlier 10.15 ± 0.05	eV	NIST
IE	10.40 ± 0.10	eV	NIST
IE	10.40	eV	NIST
IE	10.57	eV	NIST
IE	10.60 ± 0.10	eV	NIST
IE	10.56	eV	NIST
IE	10.56 ± 0.01	eV	NIST
IE	10.57	eV	NIST
IE	10.57	eV	NIST
IE	10.57 ± 0.01	eV	NIST
IE	10.57	eV	NIST
IE	10.57	eV	NIST
IE	10.57	eV	NIST
IE	10.57	eV	NIST
IE	10.57	eV	NIST
log10WS	0.36		Crippen Calculated Property
logPoct/wat	0.017		Crippen Calculated Property
McVol	34.050	ml/mol	McGowan Calculated Property
NFPA Fire	4		KDB
NFPA Health	2		KDB
Pc	[7190.00; 7233.00]	kPa
Pc	7190.00	kPa	KDB
Pc	7233.00 ± 68.94	kPa	NIST
Pc	7191.00 ± 75.84	kPa	NIST
ρc	[314.10; 319.82]	kg/m3
ρc	314.10 ± 10.13	kg/m3	NIST
ρc	319.82 ± 10.13	kg/m3	NIST
Inp	[397.00; 417.00]
Inp	397.00		NIST
Inp	410.00		NIST
Inp	417.00		NIST
Inp	417.00		NIST
Inp	405.00		NIST
Inp	405.00		NIST
Inp	400.00		NIST
Inp	400.00		NIST
I	680.00		NIST
S°liquid	149.45	J/mol×K	NIST
Tboil	[283.55; 286.15]	K
Tboil	283.70	K	KDB
Tboil	283.70	K	NIST
Tboil	283.55	K	NIST
Tboil	286.15 ± 1.50	K	NIST
Tboil	283.85 ± 0.40	K	NIST
Tboil	283.88 ± 0.20	K	NIST
Tboil	286.00 ± 4.00	K	NIST
Tc	[465.20; 469.00]	K
Tc	469.00	K	KDB
Tc	468.90 ± 1.11	K	NIST
Tc	469.00 ± 1.00	K	NIST
Tc	465.20 ± 2.00	K	NIST
Tfus	[160.55; 161.90]	K
Tfus	161.40	K	KDB
Tfus	160.55	K	NIST
Tfus	160.60 ± 0.07	K	NIST
Tfus	161.45 ± 0.40	K	NIST
Tfus	161.90 ± 0.60	K	NIST
Ttriple	[160.65; 160.65]	K
Ttriple	160.65 ± 0.05	K	NIST
Ttriple	160.65 ± 0.02	K	NIST
Vc	0.140	m3/kmol	KDB
Zc	0.2581350		KDB
Zra	0.26		KDB

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[49.37; 58.41]	J/mol×K	[307.18; 371.23]
Cp,gas	49.37	J/mol×K	307.18	NIST
Cp,gas	53.51	J/mol×K	337.04	NIST
Cp,gas	58.41	J/mol×K	371.23	NIST
Cp,liquid	86.90	J/mol×K	285.00	NIST
η	[0.0002359; 0.0008047]	Pa×s	[161.05; 283.52]
T(K) Dynamic viscosity (Pa×s) 2.00e-4 3.00e-4 4.00e-4 5.00e-4 6.00e-4 7.00e-4 8.00e-4 200 250
η	0.0008047	Pa×s	161.05	Joback Calculated Property
η	0.0005846	Pa×s	181.46	Joback Calculated Property
η	0.0004531	Pa×s	201.87	Joback Calculated Property
η	0.0003680	Pa×s	222.28	Joback Calculated Property
η	0.0003095	Pa×s	242.70	Joback Calculated Property
η	0.0002674	Pa×s	263.11	Joback Calculated Property
η	0.0002359	Pa×s	283.52	Joback Calculated Property
ΔfusH	[5.17; 5.17]	kJ/mol	[160.65; 160.70]
ΔfusH	5.17	kJ/mol	160.65	NIST
ΔfusH	5.17	kJ/mol	160.70	NIST
ΔfusH	5.17	kJ/mol	160.70	NIST
ΔvapH	[25.50; 26.90]	kJ/mol	[253.50; 290.50]
T(K) Enthalpy of vaporization at a given temperature (kJ/mol) 25.5 26 26.5 27 260 270 280 290
ΔvapH	26.80	kJ/mol	253.50	NIST
ΔvapH	26.80	kJ/mol	261.50	NIST
ΔvapH	25.53	kJ/mol	283.66	NIST
ΔvapH	25.50 ± 0.30	kJ/mol	283.66	NIST
ΔvapH	25.54	kJ/mol	283.70	NIST
ΔvapH	25.61	kJ/mol	283.80	KDB
ΔvapH	26.90	kJ/mol	290.50	NIST
Pvap	[174.71; 766.70]	kPa	[298.15; 348.15]
Pvap	174.71	kPa	298.15	Vapor-L...
Pvap	766.70	kPa	348.15	Vapor-L...
ρl	899.00	kg/m3	273.00	KDB
ΔfusS	32.20	J/mol×K	160.65	NIST
γ	0.03	N/m	243.20	KDB
ΔvapS	89.99	J/mol×K	283.66	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.33; 6516.51]	kPa	[207.53; 469.15]	The Yaw...
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.45512e+01
Coefficient B			-2.53439e+03
Coefficient C			-2.98490e+01
Temperature range, min.			207.53
Temperature range, max.			469.15
T(K) Vapor pressure (kPa) 0 1000 2000 3000 4000 5000 6000 7000 300 400
Pvap	1.33	kPa	207.53	Calculated Property
Pvap	9.90	kPa	236.60	Calculated Property
Pvap	44.88	kPa	265.67	Calculated Property
Pvap	145.98	kPa	294.74	Calculated Property
Pvap	376.00	kPa	323.81	Calculated Property
Pvap	816.84	kPa	352.87	Calculated Property
Pvap	1561.17	kPa	381.94	Calculated Property
Pvap	2703.07	kPa	411.01	Calculated Property
Pvap	4329.88	kPa	440.08	Calculated Property
Pvap	6516.51	kPa	469.15	Calculated Property
Pvap	[7.61e-03; 7296.19]	kPa	[160.71; 469.15]	KDB Vap...
Equation			ln(Pvp) = A + B/T + C*ln(T) + D*T^2
Coefficient A			6.64077e+01
Coefficient B			-5.01071e+03
Coefficient C			-7.94255e+00
Coefficient D			9.18560e-06
Temperature range, min.			160.71
Temperature range, max.			469.15
T(K) Vapor pressure (kPa) 0 1000 2000 3000 4000 5000 6000 7000 8000 200 300 400
Pvap	7.61e-03	kPa	160.71	Calculated Property
Pvap	0.44	kPa	194.98	Calculated Property
Pvap	6.47	kPa	229.25	Calculated Property
Pvap	42.88	kPa	263.52	Calculated Property
Pvap	172.83	kPa	297.79	Calculated Property
Pvap	503.69	kPa	332.07	Calculated Property
Pvap	1180.08	kPa	366.34	Calculated Property
Pvap	2379.35	kPa	400.61	Calculated Property
Pvap	4321.33	kPa	434.88	Calculated Property
Pvap	7296.19	kPa	469.15	Calculated Property

Similar Compounds

Find more compounds similar to Ethylene oxide.

Mixtures

• Ethylene oxide + Isobutane
• Dodecane + Ethylene oxide
• Ethylene oxide + 1-Decanol
• 1-Dodecanol + Ethylene oxide

Sources

• KDB Vapor Pressure Data
• Crippen Method
• Crippen Method
• Vapor-Liquid Equilibria on Seven Binary Systems: Ethylene Oxide + 2-Methylpropane; Acetophenone + Phenol; cis-1,3-Dichloropropene + 1,2-Dichloropropane; 1,5-Hexadiene + Allyl Chloride; Isopropyl Acetate + Acetonitrile; Vinyl Chloride + Methyl Chloride; and 1,4-Butanediol + c-Butyrolactone
• Vapor-Liquid Equilibria of Binary Systems of Ethene Oxide + Dodecane, Ethene Oxide + 1-Decanol, and Ethene Oxide + 1-Dodecanol and Prediction with the Predictive Soave-Redlich-Kwong (PSRK) Equation of State
• Joback Method
• KDB
• McGowan Method
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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