Chemical Properties of Hydrogen cyanide (CAS 74-90-8)

InChI

InChI=1S/CHN/c1-2/h1H

InChI Key

LELOWRISYMNNSU-UHFFFAOYSA-N

Formula

CHN

SMILES

C#N

Molecular Weight¹

27.03

CAS

74-90-8

Other Names

• AC
• Acide cyanhydrique
• Acido cianidrico
• Aero Liquid HCN
• Agent AC
• Blausaeure
• Blausaeure (German)
• Blauwzuur
• CARBON HYDRIDE NITIDE
• Carbon hydride nitride
• Carbon hydride nitride (CHN)
• Cyaanwaterstof
• Cyanwasserstoff
• Cyclon
• Cyclone B
• Cyjanowodor
• Evercyn
• Formic anammonide
• Formonitrile
• HCN
• Hydrocyanic acid
• NA 1051
• Nitrilomethane
• Prussic Acid
• Prussic acid, unstabilized
• Rcra waste number P063
• UN 1051
• Zaclondiscoids
• Zootic acid
• methanenitrile

• ω : Acentric Factor.
• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (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).
• EA : Electron affinity (eV).
• 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_subH : Enthalpy of sublimation at a given temperature (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_triple : Triple Point Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• ρ_l : Liquid Density (kg/m³).
• I_np : Non-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).
• λ_gas : Gas thermal conductivity (W/m×K).
• λ_liquid : Liquid thermal conductivity (W/m×K).
• T_fus : Normal melting (fusion) point (K).
• T_triple : Triple Point Temperature (K).
• U_Qi : UNIQUAC Qi Parameter.
• U_Ri : UNIQUAC Ri Parameter.
• 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	[0.3880; 0.4099]
ω	0.4070		PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
ω	0.4099		ChemSep v8.3 pure component data Compiled value
ω	0.3880		KDB
PAff	712.90	kJ/mol	NIST
BasG	681.60	kJ/mol	NIST
μ	[2.98; 3.00]	debye
μ	2.98	debye	ChemSep v8.3 pure component data Compiled value
μ	3.00	debye	KDB
EA	[0.00; 1.00]	eV
EA	0.00	eV	NIST
EA	1.00	eV	NIST
ΔfG°	[120.20; 124.72]	kJ/mol
ΔfG°	124.72	kJ/mol	ChemSep v8.3 pure component data Compiled value
ΔfG°	120.20	kJ/mol	KDB
ΔfH°gas	[129.29; 135.14]	kJ/mol
ΔfH°gas	129.29 ± 0.10	kJ/mol	Active Thermochemical Tables 1.112, gas-phase enthalpies of formation Compiled value
ΔfH°gas	135.14	kJ/mol	ChemSep v8.3 pure component data Compiled value
ΔfH°gas	130.60	kJ/mol	KDB
ΔfusH°	1.53	kJ/mol	Joback Calculated Property
IE	[13.59; 13.73]	eV
IE	13.60 ± 0.01	eV	NIST
IE	13.71	eV	NIST
IE	13.59 ± 0.01	eV	NIST
IE	13.60 ± 0.01	eV	NIST
IE	13.73 ± 0.09	eV	NIST
IE	13.70 ± 0.10	eV	NIST
IE	13.61	eV	NIST
IE	13.61 ± 0.00	eV	NIST
IE	13.60	eV	NIST
IE	13.61 ± 0.01	eV	NIST
logPoct/wat	0.140		Crippen Calculated Property
McVol	26.330	ml/mol	McGowan Calculated Property
NFPA Fire	4		KDB
NFPA Health	4		KDB
NFPA Safety	2		KDB
Pc	[5390.00; 5400.00]	kPa
Pc	5400.00	kPa	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 9 Compiled value
Pc	5390.49	kPa	Mathews (1972), critical constants of inorganic substances Compiled value
Pc	5390.49	kPa	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Pc	5390.00	kPa	ChemSep v8.3 pure component data Compiled value
Pc	5390.00	kPa	KDB
Ptriple	18.62	kPa	ChemSep v8.3 pure component data Compiled value
Inp	[300.00; 320.00]
Inp	319.90		NIST
Inp	300.00		NIST
Inp	320.00		NIST
Inp	319.90		NIST
S°liquid	113.01	J/mol×K	NIST
Tboil	[298.80; 299.70]	K
Tboil	298.85	K	ChemSep v8.3 pure component data Compiled value
Tboil	299.00	K	KDB
Tboil	298.90 ± 0.50	K	NIST
Tboil	298.90 ± 0.40	K	NIST
Tboil	299.00 ± 0.40	K	NIST
Tboil	299.00 ± 1.50	K	NIST
Tboil	298.90 ± 0.50	K	NIST
Tboil	299.08 ± 0.40	K	NIST
Tboil	298.90 ± 0.50	K	NIST
Tboil	298.80 ± 0.50	K	NIST
Tboil	298.90 ± 0.30	K	NIST
Tboil	298.90 ± 0.40	K	NIST
Tboil	299.50 ± 1.00	K	NIST
Tboil	298.90 ± 1.00	K	NIST
Tboil	Outlier 299.70 ± 0.50	K	NIST
Tboil	298.90 ± 0.50	K	NIST
Tboil	299.40 ± 0.60	K	NIST
Tc	[456.65; 457.00]	K
Tc	457.00	K	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 9 Compiled value
Tc	456.80	K	Mathews (1972), critical constants of inorganic substances Compiled value
Tc	456.80	K	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tc	456.65	K	ChemSep v8.3 pure component data Compiled value
Tc	456.70	K	KDB
Tfus	[258.29; 286.50]	K
Tfus	259.75	K	Jean-Claude Bradley Open Melting Point Dataset (2014, CC0) Compiled value
Tfus	259.91	K	ChemSep v8.3 pure component data Compiled value
Tfus	259.70	K	KDB
Tfus	259.85 ± 0.20	K	NIST
Tfus	259.90 ± 0.10	K	NIST
Tfus	259.88 ± 0.10	K	NIST
Tfus	259.86 ± 0.05	K	NIST
Tfus	258.30 ± 1.00	K	NIST
Tfus	Outlier 286.50 ± 0.20	K	NIST
Tfus	259.20 ± 0.50	K	NIST
Tfus	259.00 ± 1.50	K	NIST
Tfus	258.29 ± 1.00	K	NIST
Tfus	259.75 ± 0.30	K	NIST
Tfus	259.80 ± 0.20	K	NIST
Tfus	259.85 ± 0.30	K	NIST
Tfus	259.81 ± 0.50	K	NIST
Tfus	259.75 ± 0.50	K	NIST
Ttriple	[259.83; 259.86]	K
Ttriple	259.83	K	ChemSep v8.3 pure component data Compiled value
Ttriple	259.86 ± 0.02	K	NIST
Ttriple	259.86 ± 0.02	K	NIST
UQi	1.21		ChemSep v8.3 pure component data Compiled value
URi	1.20		ChemSep v8.3 pure component data Compiled value
Vc	[0.135; 0.139]	m3/kmol
Vc	Outlier 0.135	m3/kmol	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 9 Compiled value
Vc	0.139	m3/kmol	Mathews (1972), critical constants of inorganic substances Compiled value
Vc	0.139	m3/kmol	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Vc	0.139	m3/kmol	ChemSep v8.3 pure component data Compiled value
Vc	0.139	m3/kmol	KDB
Zc	[0.1920000; 0.1973040]
Zc	0.1920000		IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 9 Compiled value
Zc	0.1970000		Mathews (1972), critical constants of inorganic substances Compiled value
Zc	0.1970000		ChemSep v8.3 pure component data Compiled value
Zc	0.1973040		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

Property	Value	Unit	Temperature (K)	Source
Cp,liquid	71.00	J/mol×K	300.00	NIST
ΔfusH	[8.41; 8.41]	kJ/mol	[259.90; 259.90]
ΔfusH	8.41	kJ/mol	259.90	NIST
ΔfusH	8.41	kJ/mol	259.90	NIST
ΔsubH	[35.60; 37.60]	kJ/mol	[228.00; 247.50]
ΔsubH	37.60	kJ/mol	228.00	NIST
ΔsubH	35.60	kJ/mol	247.50	NIST
ΔvapH	[25.22; 28.10]	kJ/mol	[276.50; 377.50]
ΔvapH	28.00	kJ/mol	276.50	NIST
ΔvapH	28.10	kJ/mol	279.00	NIST
ΔvapH	27.80	kJ/mol	282.50	NIST
ΔvapH	28.10	kJ/mol	286.00	NIST
ΔvapH	27.20	kJ/mol	287.50	NIST
ΔvapH	28.10	kJ/mol	288.00	NIST
ΔvapH	25.22	kJ/mol	298.85	NIST
ΔvapH	25.22	kJ/mol	298.85	NIST
ΔvapH	27.80	kJ/mol	377.50	NIST
ρl	688.00	kg/m3	293.00	KDB
ΔfusS	[32.34; 32.34]	J/mol×K	[259.90; 259.90]
ΔfusS	32.34	J/mol×K	259.90	NIST
ΔfusS	32.34	J/mol×K	259.90	NIST
ΔvapS	[84.38; 84.38]	J/mol×K	[298.85; 298.85]
ΔvapS	84.38	J/mol×K	298.85	NIST
ΔvapS	84.38	J/mol×K	298.85	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[29.55; 55.50]	J/mol×K	[100.00; 1500.00]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is Cp,gas in J/mol×K, T in K
Coefficient A			2.92890e+01
Coefficient B			-4.82840e+02
Coefficient C			3.49624e+00
Coefficient D			-4.16590e-05
Coefficient E			6.85530e-08
Temperature range, min.			100.00
Temperature range, max.			1500.00
Cp,gas	29.55	J/mol×K	100.00	Calculated Property
Cp,gas	34.25	J/mol×K	255.56	Calculated Property
Cp,gas	39.43	J/mol×K	411.11	Calculated Property
Cp,gas	43.34	J/mol×K	566.67	Calculated Property
Cp,gas	46.29	J/mol×K	722.22	Calculated Property
Cp,gas	48.63	J/mol×K	877.78	Calculated Property
Cp,gas	50.60	J/mol×K	1033.33	Calculated Property
Cp,gas	52.33	J/mol×K	1188.89	Calculated Property
Cp,gas	53.94	J/mol×K	1344.44	Calculated Property
Cp,gas	55.50	J/mol×K	1500.00	Calculated Property
Cp,gas	[35.85; 52.61]	J/mol×K	[298.00; 1200.00]	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			3.26937e+01
Coefficient B			2.25921e+01
Coefficient C			-4.36914e+00
Coefficient D			-4.07697e-01
Coefficient E			-2.82399e-01
Reference			Chase, 1998
Comment			F=123.4811, G=233.2597, H=135.1432; Data last reviewed in December, 1969
Temperature range, min.			298.00
Temperature range, max.			1200.00
Cp,gas	35.85	J/mol×K	298.00	Calculated Property
Cp,gas	39.19	J/mol×K	398.22	Calculated Property
Cp,gas	41.68	J/mol×K	498.44	Calculated Property
Cp,gas	43.78	J/mol×K	598.67	Calculated Property
Cp,gas	45.63	J/mol×K	698.89	Calculated Property
Cp,gas	47.31	J/mol×K	799.11	Calculated Property
Cp,gas	48.83	J/mol×K	899.33	Calculated Property
Cp,gas	50.22	J/mol×K	999.56	Calculated Property
Cp,gas	51.48	J/mol×K	1099.78	Calculated Property
Cp,gas	52.61	J/mol×K	1200.00	Calculated Property
Cp,gas	[52.51; 63.47]	J/mol×K	[1200.00; 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			5.23653e+01
Coefficient B			5.56330e+00
Coefficient C			-9.53224e-01
Coefficient D			5.67110e-02
Coefficient E			-7.56409e+00
Reference			Chase, 1998
Comment			F=103.8523, G=244.8448, H=135.1432; Data last reviewed in December, 1969
Temperature range, min.			1200.00
Temperature range, max.			6000.00
Cp,gas	52.51	J/mol×K	1200.00	Calculated Property
Cp,gas	56.92	J/mol×K	1733.33	Calculated Property
Cp,gas	59.27	J/mol×K	2266.67	Calculated Property
Cp,gas	60.75	J/mol×K	2800.00	Calculated Property
Cp,gas	61.74	J/mol×K	3333.33	Calculated Property
Cp,gas	62.40	J/mol×K	3866.67	Calculated Property
Cp,gas	62.83	J/mol×K	4400.00	Calculated Property
Cp,gas	63.11	J/mol×K	4933.33	Calculated Property
Cp,gas	63.30	J/mol×K	5466.67	Calculated Property
Cp,gas	63.47	J/mol×K	6000.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
Cp,liquid	[70.29; 71.04]	J/mol×K	[259.83; 298.85]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is Cp,liquid in J/mol×K, T in K
Coefficient A			7.02270e+01
Coefficient B			-1.02790e+04
Coefficient C			3.51202e+01
Coefficient D			6.90850e-02
Coefficient E			-2.41540e-04
Temperature range, min.			259.83
Temperature range, max.			298.85
Cp,liquid	70.29	J/mol×K	259.83	Calculated Property
Cp,liquid	70.32	J/mol×K	264.17	Calculated Property
Cp,liquid	70.36	J/mol×K	268.50	Calculated Property
Cp,liquid	70.41	J/mol×K	272.84	Calculated Property
Cp,liquid	70.48	J/mol×K	277.17	Calculated Property
Cp,liquid	70.56	J/mol×K	281.51	Calculated Property
Cp,liquid	70.66	J/mol×K	285.84	Calculated Property
Cp,liquid	70.78	J/mol×K	290.18	Calculated Property
Cp,liquid	70.91	J/mol×K	294.51	Calculated Property
Cp,liquid	71.04	J/mol×K	298.85	Calculated Property

Property	Value	Unit	Temperature (K)	Source
η	[0.0002753; 0.0001137]	Pa×s	[259.83; 356.00]	ChemSep v8.3 pure component data Compiled value
Equation			Y = exp(A + B/T + C·ln(T) + D·T^E) Y is η in Pa×s, T in K
Coefficient A			-1.25450e+01
Coefficient B			8.43500e+02
Coefficient C			2.13440e-01
Coefficient D			-1.26730e-06
Coefficient E			2.00000e+00
Temperature range, min.			259.83
Temperature range, max.			356.00
η	0.0002753	Pa×s	259.83	Calculated Property
η	0.0002426	Pa×s	270.52	Calculated Property
η	0.0002156	Pa×s	281.20	Calculated Property
η	0.0001932	Pa×s	291.89	Calculated Property
η	0.0001744	Pa×s	302.57	Calculated Property
η	0.0001585	Pa×s	313.26	Calculated Property
η	0.0001448	Pa×s	323.94	Calculated Property
η	0.0001330	Pa×s	334.63	Calculated Property
η	0.0001227	Pa×s	345.31	Calculated Property
η	0.0001137	Pa×s	356.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
ΔvapH	[28.88; 0.00]	kJ/mol	[223.15; 456.65]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A·(1 − Tr)^(B + C·Tr + D·Tr² + E·Tr³), Tr = T/Tc Y is ΔvapH in kJ/mol, T in K
Coefficient A			4.52250e+01
Coefficient B			2.05490e+00
Coefficient C			-4.74320e+00
Coefficient D			4.79960e+00
Coefficient E			-1.83660e+00
Critical temperature, Tc (K)			4.56650e+02
Temperature range, min.			223.15
Temperature range, max.			456.65
ΔvapH	28.88	kJ/mol	223.15	Calculated Property
ΔvapH	28.23	kJ/mol	249.09	Calculated Property
ΔvapH	27.54	kJ/mol	275.04	Calculated Property
ΔvapH	26.75	kJ/mol	300.98	Calculated Property
ΔvapH	25.82	kJ/mol	326.93	Calculated Property
ΔvapH	24.70	kJ/mol	352.87	Calculated Property
ΔvapH	23.31	kJ/mol	378.82	Calculated Property
ΔvapH	21.47	kJ/mol	404.76	Calculated Property
ΔvapH	18.60	kJ/mol	430.71	Calculated Property
ΔvapH	0.00	kJ/mol	456.65	Calculated Property

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.33; 5289.38]	kPa	[215.04; 456.65]	The Yaws Handbook of Vapor Pressure
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.64196e+01
Coefficient B			-3.69077e+03
Coefficient C			1.37430e+01
Temperature range, min.			215.04
Temperature range, max.			456.65
Pvap	1.33	kPa	215.04	Calculated Property
Pvap	7.25	kPa	241.89	Calculated Property
Pvap	28.61	kPa	268.73	Calculated Property
Pvap	88.92	kPa	295.58	Calculated Property
Pvap	230.57	kPa	322.42	Calculated Property
Pvap	519.30	kPa	349.27	Calculated Property
Pvap	1045.86	kPa	376.11	Calculated Property
Pvap	1924.65	kPa	402.96	Calculated Property
Pvap	3289.76	kPa	429.80	Calculated Property
Pvap	5289.38	kPa	456.65	Calculated Property
Pvap	[13.98; 5180.24]	kPa	[254.07; 456.65]	ChemSep v8.3 pure component data Compiled value
Equation			Y = exp(A + B/T + C·ln(T) + D·T^E) Y is Pvap in kPa, T in K
Coefficient A			3.57933e+01
Coefficient B			-4.00150e+03
Coefficient C			-3.20873e+00
Coefficient D			5.62062e-06
Coefficient E			2.00000e+00
Comment			Range stopped at Tc; ChemSep gives it to 456.75 K.
Temperature range, min.			254.07
Temperature range, max.			456.65
Pvap	13.98	kPa	254.07	Calculated Property
Pvap	41.03	kPa	276.58	Calculated Property
Pvap	101.99	kPa	299.09	Calculated Property
Pvap	222.97	kPa	321.60	Calculated Property
Pvap	440.57	kPa	344.11	Calculated Property
Pvap	803.23	kPa	366.61	Calculated Property
Pvap	1372.55	kPa	389.12	Calculated Property
Pvap	2225.21	kPa	411.63	Calculated Property
Pvap	3455.71	kPa	434.14	Calculated Property
Pvap	5180.24	kPa	456.65	Calculated Property
Pvap	[16.02; 207.95]	kPa	[256.73; 319.38]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.53678e+01
Coefficient B			-3.08729e+03
Coefficient C			-1.15920e+01
Reference			Sinozaki, Hara, et al., 1926
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			256.73
Temperature range, max.			319.38
Pvap	16.02	kPa	256.73	Calculated Property
Pvap	22.68	kPa	263.69	Calculated Property
Pvap	31.52	kPa	270.65	Calculated Property
Pvap	43.05	kPa	277.61	Calculated Property
Pvap	57.88	kPa	284.57	Calculated Property
Pvap	76.68	kPa	291.54	Calculated Property
Pvap	100.20	kPa	298.50	Calculated Property
Pvap	129.29	kPa	305.46	Calculated Property
Pvap	164.87	kPa	312.42	Calculated Property
Pvap	207.95	kPa	319.38	Calculated Property

Property	Value	Unit	Temperature (K)	Source
ρl	[735.15; 193.07]	kg/m3	[259.83; 456.65]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A / B^(1 + (1 − T/C)^D) Y is ρl in kg/m3, T in K
Coefficient A			3.55735e+01
Coefficient B			1.84250e-01
Coefficient C			4.56650e+02
Coefficient D			2.79400e-01
Temperature range, min.			259.83
Temperature range, max.			456.65
ρl	735.15	kg/m3	259.83	Calculated Property
ρl	704.01	kg/m3	281.70	Calculated Property
ρl	671.44	kg/m3	303.57	Calculated Property
ρl	637.07	kg/m3	325.44	Calculated Property
ρl	600.39	kg/m3	347.31	Calculated Property
ρl	560.60	kg/m3	369.17	Calculated Property
ρl	516.30	kg/m3	391.04	Calculated Property
ρl	464.67	kg/m3	412.91	Calculated Property
ρl	398.10	kg/m3	434.78	Calculated Property
ρl	193.07	kg/m3	456.65	Calculated Property

Property	Value	Unit	Temperature (K)	Source
γ	[0.02; 1.96e-06]	N/m	[259.83; 456.45]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is γ in N/m, T in K
Coefficient A			-5.88530e-02
Coefficient B			3.15480e+00
Coefficient C			-2.24880e+00
Coefficient D			-7.61170e-04
Coefficient E			-1.16800e-06
Comment			Range stopped where the equation turns negative; ChemSep gives it to 456.65 K.
Temperature range, min.			259.83
Temperature range, max.			456.45
γ	0.02	N/m	259.83	Calculated Property
γ	0.02	N/m	281.68	Calculated Property
γ	0.02	N/m	303.52	Calculated Property
γ	0.01	N/m	325.37	Calculated Property
γ	0.01	N/m	347.22	Calculated Property
γ	0.01	N/m	369.07	Calculated Property
γ	0.01	N/m	390.91	Calculated Property
γ	0.00	N/m	412.76	Calculated Property
γ	0.00	N/m	434.61	Calculated Property
γ	1.96e-06	N/m	456.45	Calculated Property

Property	Value	Unit	Temperature (K)	Source
λgas	[0.01; 0.04]	W/m×K	[259.83; 673.15]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A·T^B / (1 + C/T + D/T²) Y is λgas in W/m×K, T in K
Coefficient A			1.58370e-05
Coefficient B			1.20550e+00
Coefficient C			-9.85660e+01
Coefficient D			5.30910e+04
Temperature range, min.			259.83
Temperature range, max.			673.15
λgas	0.01	W/m×K	259.83	Calculated Property
λgas	0.01	W/m×K	305.76	Calculated Property
λgas	0.02	W/m×K	351.68	Calculated Property
λgas	0.02	W/m×K	397.61	Calculated Property
λgas	0.02	W/m×K	443.53	Calculated Property
λgas	0.03	W/m×K	489.45	Calculated Property
λgas	0.03	W/m×K	535.38	Calculated Property
λgas	0.03	W/m×K	581.30	Calculated Property
λgas	0.04	W/m×K	627.23	Calculated Property
λgas	0.04	W/m×K	673.15	Calculated Property

Property	Value	Unit	Temperature (K)	Source
λliquid	[0.25; 0.23]	W/m×K	[259.83; 298.85]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is λliquid in W/m×K, T in K
Coefficient A			6.90100e-02
Coefficient B			-1.83380e+02
Coefficient C			8.78950e-01
Coefficient D			-7.80310e-03
Coefficient E			2.35300e-06
Temperature range, min.			259.83
Temperature range, max.			298.85
λliquid	0.25	W/m×K	259.83	Calculated Property
λliquid	0.25	W/m×K	264.17	Calculated Property
λliquid	0.25	W/m×K	268.50	Calculated Property
λliquid	0.24	W/m×K	272.84	Calculated Property
λliquid	0.24	W/m×K	277.17	Calculated Property
λliquid	0.24	W/m×K	281.51	Calculated Property
λliquid	0.23	W/m×K	285.84	Calculated Property
λliquid	0.23	W/m×K	290.18	Calculated Property
λliquid	0.23	W/m×K	294.51	Calculated Property
λliquid	0.23	W/m×K	298.85	Calculated Property

Similar Compounds

Find more compounds similar to Hydrogen cyanide.

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).
• IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 9 ChEDL chemicals 1.5.2, from Marsh, K. N.; Young, C. L.; Morton, D. W.; Ambrose, D.; Tsonopoulos, C. Vapor-Liquid Critical Properties of Elements and Compounds. 9. Organic Compounds Containing Nitrogen. J. Chem. Eng. Data 2006, 51, 305-314.
• 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.
• ChemSep v8.3 pure component data Converted from ChemSep v8.3 pure component data, H. Kooijman and R. Taylor (2021, 2022), Artistic License 2.0; see how the values differ.
• Crippen Method
• Crippen Method
• Joback Method
• KDB
• McGowan Method
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more. Take the time to validate and double check the source of the data.
Outlier This icon means that the value is more than 2 standard deviations away from the property mean.
Calculated This icon marks a calculated value or equation: a prediction, not a measurement.
Compiled This icon marks a compiled value or equation: taken from a data compilation such as ChemSep, not from an original measurement report.
These property values are available through the Cheméo API. A free account gives you an access key.