Chemical Properties of Hydrazine (CAS 302-01-2)

InChI

InChI=1S/H4N2/c1-2/h1-2H2

InChI Key

OAKJQQAXSVQMHS-UHFFFAOYSA-N

Formula

H4N2

SMILES

NN

Molecular Weight¹

32.05

CAS

302-01-2

Other Names

• DIAMIDE
• DIAMIDE HYDRATE
• Diamine
• Hydrazine base
• Hydrazine, anhydrous
• Hydrazyna
• Levoxine
• N2H4
• Nitrogen hydride, (N2H4)
• Oxytreat 35
• Rcra waste number U133

• ω : Acentric Factor.
• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (kJ/mol).
• Δ_cH°_gas : Standard gas 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).
• 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_vapH : Enthalpy of vaporization at a given temperature (kJ/mol).
• IE : Ionization energy (eV).
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• NFPA Fire : NFPA Fire Rating.
• NFPA Health : NFPA Health Rating.
• NFPA Safety : NFPA Safety Rating.
• P_c : Critical Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• ρ_l : Liquid Density (kg/m³).
• 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).
• V_COSTALD : COSTALD Characteristic Volume (m³/kmol).
• ω_SRK : SRK acentric factor.
• Z_ra : Rackett Parameter.
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	[0.3160; 0.3280]
ω	0.3280		PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
ω	0.3160		KDB
PAff	853.20	kJ/mol	NIST
BasG	822.40	kJ/mol	NIST
ΔcH°gas	-622.08	kJ/mol	NIST
μ	3.00	debye	KDB
ΔfG°	158.60	kJ/mol	KDB
ΔfH°gas	[50.42; 150.00]	kJ/mol
ΔfH°gas	95.51 ± 0.19	kJ/mol	Active Thermochemical Tables 1.112, gas-phase enthalpies of formation Compiled value
ΔfH°gas	95.25	kJ/mol	KDB
ΔfH°gas	150.00 ± 8.00	kJ/mol	NIST
ΔfH°gas	50.42	kJ/mol	NIST
ΔfusH°	6.15	kJ/mol	Joback Calculated Property
IE	[8.10; 10.68]	eV
IE	8.10 ± 0.15	eV	NIST
IE	8.10 ± 0.15	eV	NIST
IE	8.93 ± 0.05	eV	NIST
IE	8.93	eV	NIST
IE	8.80	eV	NIST
IE	8.74 ± 0.06	eV	NIST
IE	8.36 ± 0.03	eV	NIST
IE	9.00 ± 0.10	eV	NIST
IE	9.56 ± 0.02	eV	NIST
IE	8.98 ± 0.05	eV	NIST
IE	Outlier 10.68	eV	NIST
IE	9.90	eV	NIST
IE	9.91	eV	NIST
IE	10.07	eV	NIST
logPoct/wat	-1.181		Crippen Calculated Property
McVol	30.820	ml/mol	McGowan Calculated Property
NFPA Fire	3		KDB
NFPA Health	3		KDB
NFPA Safety	2		KDB
Pc	[14692.12; 14700.00]	kPa
Pc	14692.12	kPa	Mathews (1972), critical constants of inorganic substances Compiled value
Pc	14692.13	kPa	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Pc	14700.00	kPa	KDB
Tboil	[386.40; 386.95]	K
Tboil	386.70	K	KDB
Tboil	386.65 ± 0.50	K	NIST
Tboil	386.40 ± 1.00	K	NIST
Tboil	386.95 ± 0.50	K	NIST
Tc	[653.00; 653.00]	K
Tc	653.00	K	Mathews (1972), critical constants of inorganic substances Compiled value
Tc	653.00	K	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tc	653.00	K	KDB
Tfus	[274.50; 275.15]	K
Tfus	275.15	K	Jean-Claude Bradley Open Melting Point Dataset (2014, CC0) Compiled value
Tfus	274.50	K	KDB
Tfus	275.00 ± 1.50	K	NIST
Tfus	274.65 ± 0.50	K	NIST
Tfus	275.15 ± 1.00	K	NIST
Ttriple	[274.56; 274.69]	K
Ttriple	274.56 ± 0.10	K	NIST
Ttriple	274.69 ± 0.05	K	NIST
Vc	0.096	m3/kmol	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
VCOSTALD	0.10	m3/kmol	Hankinson and Thomson (1979), COSTALD parameters Compiled value
ωSRK	0.34		Hankinson and Thomson (1979), COSTALD parameters Compiled value
Zra	[0.26; 0.26]
Zra	0.26		Hankinson and Thomson (1979), COSTALD parameters Compiled value
Zra	0.26		KDB

Cheméo can also estimate Enthalpy of vaporization at standard conditions, 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

Correlations

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[88.15; 118.41]	J/mol×K	[800.00; 2000.00]	NIST
Equation			Y = A + B·t + C·t² + D·t³ + E/t², t = T/1000 Y is Cp,gas in J/mol×K, T in K
Coefficient A			3.51824e+01
Coefficient B			9.60526e+01
Coefficient C			-4.05013e+01
Coefficient D			6.66807e+00
Coefficient E			-8.74233e-01
Reference			Chase, 1998
Comment			F=77.99150, G=249.4250, H=95.35340; Data last reviewed in December, 1965
Temperature range, min.			800.00
Temperature range, max.			2000.00
Cp,gas	88.15	J/mol×K	800.00	Calculated Property
Cp,gas	93.97	J/mol×K	933.33	Calculated Property
Cp,gas	98.88	J/mol×K	1066.67	Calculated Property
Cp,gas	103.04	J/mol×K	1200.00	Calculated Property
Cp,gas	106.56	J/mol×K	1333.33	Calculated Property
Cp,gas	109.57	J/mol×K	1466.67	Calculated Property
Cp,gas	112.15	J/mol×K	1600.00	Calculated Property
Cp,gas	114.42	J/mol×K	1733.33	Calculated Property
Cp,gas	116.48	J/mol×K	1866.67	Calculated Property
Cp,gas	118.41	J/mol×K	2000.00	Calculated Property
Cp,gas	[118.13; 131.04]	J/mol×K	[2000.00; 6000.00]	NIST
Equation			Y = A + B·t + C·t² + D·t³ + E/t², t = T/1000 Y is Cp,gas in J/mol×K, T in K
Coefficient A			1.21401e+02
Coefficient B			4.81688e+00
Coefficient C			-7.63012e-01
Coefficient D			4.32320e-02
Coefficient E			-4.07865e+01
Reference			Chase, 1998
Comment			F=-11.38110, G=305.3440, H=95.35340; Data last reviewed in December, 1965
Temperature range, min.			2000.00
Temperature range, max.			6000.00
Cp,gas	118.13	J/mol×K	2000.00	Calculated Property
Cp,gas	122.42	J/mol×K	2444.44	Calculated Property
Cp,gas	125.10	J/mol×K	2888.89	Calculated Property
Cp,gas	126.91	J/mol×K	3333.33	Calculated Property
Cp,gas	128.18	J/mol×K	3777.78	Calculated Property
Cp,gas	129.10	J/mol×K	4222.22	Calculated Property
Cp,gas	129.78	J/mol×K	4666.67	Calculated Property
Cp,gas	130.30	J/mol×K	5111.11	Calculated Property
Cp,gas	130.70	J/mol×K	5555.56	Calculated Property
Cp,gas	131.04	J/mol×K	6000.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
Cp,liquid	[98.81; 144.18]	J/mol×K	[298.00; 800.00]	NIST
Equation			Y = A + B·t + C·t² + D·t³ + E/t², t = T/1000 Y is Cp,liquid in J/mol×K, T in K
Coefficient A			4.81775e+01
Coefficient B			1.70486e+02
Coefficient C			-1.00834e+02
Coefficient D			4.51135e+01
Coefficient E			6.74292e-01
Reference			Chase, 1998
Comment			F=31.74310, G=136.8710, H=50.62640; Data last reviewed in December, 1965
Temperature range, min.			298.00
Temperature range, max.			800.00
Cp,liquid	98.81	J/mol×K	298.00	Calculated Property
Cp,liquid	103.26	J/mol×K	353.78	Calculated Property
Cp,liquid	108.21	J/mol×K	409.56	Calculated Property
Cp,liquid	113.34	J/mol×K	465.33	Calculated Property
Cp,liquid	118.50	J/mol×K	521.11	Calculated Property
Cp,liquid	123.66	J/mol×K	576.89	Calculated Property
Cp,liquid	128.79	J/mol×K	632.67	Calculated Property
Cp,liquid	133.90	J/mol×K	688.44	Calculated Property
Cp,liquid	139.02	J/mol×K	744.22	Calculated Property
Cp,liquid	144.18	J/mol×K	800.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
Pvap	[0.41; 14728.39]	kPa	[274.68; 653.15]	The Yaws Handbook of Vapor Pressure
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.60114e+01
Coefficient B			-3.91113e+03
Coefficient C			-4.33600e+01
Temperature range, min.			274.68
Temperature range, max.			653.15
Pvap	0.41	kPa	274.68	Calculated Property
Pvap	5.50	kPa	316.73	Calculated Property
Pvap	37.03	kPa	358.78	Calculated Property
Pvap	159.25	kPa	400.84	Calculated Property
Pvap	503.75	kPa	442.89	Calculated Property
Pvap	1279.63	kPa	484.94	Calculated Property
Pvap	2764.06	kPa	526.99	Calculated Property
Pvap	5278.37	kPa	569.05	Calculated Property
Pvap	9158.67	kPa	611.10	Calculated Property
Pvap	14728.39	kPa	653.15	Calculated Property
Pvap	[1.01; 19.23]	kPa	[288.00; 343.00]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.61435e+01
Coefficient B			-3.97146e+03
Coefficient C			-4.18330e+01
Reference			Scott, Oliver, et al., 1949, 2
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			288.00
Temperature range, max.			343.00
Pvap	1.01	kPa	288.00	Calculated Property
Pvap	1.49	kPa	294.11	Calculated Property
Pvap	2.17	kPa	300.22	Calculated Property
Pvap	3.09	kPa	306.33	Calculated Property
Pvap	4.34	kPa	312.44	Calculated Property
Pvap	6.00	kPa	318.56	Calculated Property
Pvap	8.18	kPa	324.67	Calculated Property
Pvap	11.01	kPa	330.78	Calculated Property
Pvap	14.64	kPa	336.89	Calculated Property
Pvap	19.23	kPa	343.00	Calculated Property
Pvap	[1.01; 19.23]	kPa	[288.00; 343.00]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.61435e+01
Coefficient B			-3.97146e+03
Coefficient C			-4.18330e+01
Reference			Scott, Oliver, et al., 1949
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			288.00
Temperature range, max.			343.00
Pvap	1.01	kPa	288.00	Calculated Property
Pvap	1.49	kPa	294.11	Calculated Property
Pvap	2.17	kPa	300.22	Calculated Property
Pvap	3.09	kPa	306.33	Calculated Property
Pvap	4.34	kPa	312.44	Calculated Property
Pvap	6.00	kPa	318.56	Calculated Property
Pvap	8.18	kPa	324.67	Calculated Property
Pvap	11.01	kPa	330.78	Calculated Property
Pvap	14.64	kPa	336.89	Calculated Property
Pvap	19.23	kPa	343.00	Calculated Property

Similar Compounds

Find more compounds similar to Hydrazine.

Sources

• Active Thermochemical Tables 1.112, gas-phase enthalpies of formation ChEDL chemicals 1.5.2, from Active Thermochemical Tables (ATcT), version 1.112, Argonne National Laboratory; Ruscic, B. et al. Active Thermochemical Tables: Thermochemistry for the 21st Century. J. Phys.: Conf. Ser. 2005, 16, 561.
• 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).
• Hankinson and Thomson (1979), COSTALD parameters ChEDL chemicals 1.5.2, from Hankinson, R. W.; Thomson, G. H. A New Correlation for Saturated Densities of Liquids and Their Mixtures. AIChE J. 1979, 25, 653-663.
• Mathews (1972), critical constants of inorganic substances ChEDL chemicals 1.5.2, from Mathews, J. F. Critical Constants of Inorganic Substances. Chem. Rev. 1972, 72, 71-100.
• 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.
• Crippen Method
• Crippen Method
• Joback Method
• KDB
• McGowan Method
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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