Chemical Properties of sulfur (CAS 7704-34-9)

InChI

InChI=1S/S

InChI Key

NINIDFKCEFEMDL-UHFFFAOYSA-N

Formula

S

SMILES

[S]

Molecular Weight¹

32.06

CAS

7704-34-9

Other Names

• Insoluble sulfur
• Sulfur atom
• Sulphur

• ω : Acentric Factor.
• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (kJ/mol).
• 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).
• IE : Ionization energy (eV).
• P_c : Critical Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• ρ_c : Critical density (kg/m³).
• ρ_l : Liquid Density (kg/m³).
• S°_{gas,1 bar} : Molar entropy at standard conditions (1 bar) (J/mol×K).
• S°_{solid,1 bar} : Solid phase molar entropy at standard conditions (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).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.1710		KDB
PAff	664.30	kJ/mol	NIST
BasG	640.20	kJ/mol	NIST
EA	[2.02; 2.08]	eV
EA	2.02 ± 0.00	eV	NIST
EA	2.08 ± 0.00	eV	NIST
EA	2.07 ± 0.13	eV	NIST
EA	2.08 ± 0.00	eV	NIST
ΔfG°	238.60	kJ/mol	KDB
ΔfH°gas	[277.17; 279.20]	kJ/mol
ΔfH°gas	279.20	kJ/mol	KDB
ΔfH°gas	277.17 ± 0.15	kJ/mol	NIST
IE	[10.30; 11.00]	eV
IE	10.36	eV	NIST
IE	10.36	eV	NIST
IE	10.36	eV	NIST
IE	10.36	eV	NIST
IE	10.40 ± 0.30	eV	NIST
IE	10.40 ± 0.30	eV	NIST
IE	10.36	eV	NIST
IE	10.50 ± 0.30	eV	NIST
IE	10.50	eV	NIST
IE	10.50 ± 0.30	eV	NIST
IE	10.50 ± 0.30	eV	NIST
IE	10.30 ± 0.30	eV	NIST
IE	10.36	eV	NIST
IE	Outlier 11.00 ± 0.50	eV	NIST
Pc	[18208.10; 20700.00]	kPa
Pc	20700.00	kPa	KDB
Pc	18208.10 ± 18.18	kPa	NIST
ρc	564.34 ± 5.61	kg/m3	NIST
S°gas,1 bar	167.83 ± 0.01	J/mol×K	NIST
S°solid,1 bar	32.05 ± 0.05	J/mol×K	NIST
Tboil	717.75	K	KDB
Tc	[1313.00; 1314.00]	K
Tc	1314.00	K	KDB
Tc	1313.00 ± 1.31	K	NIST
Tfus	388.36	K	KDB
Ttriple	388.33	K	KDB

Cheméo can also estimate Critical Volume, 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
ρl	[1717.47; 1848.86]	kg/m3	[334.30; 507.30]
ρl	1848.86	kg/m3	334.30	Density of molten sulfur in the 334 508K range
ρl	1848.17	kg/m3	335.30	Density of molten sulfur in the 334 508K range
ρl	1847.82	kg/m3	336.30	Density of molten sulfur in the 334 508K range
ρl	1846.09	kg/m3	337.30	Density of molten sulfur in the 334 508K range
ρl	1844.88	kg/m3	338.30	Density of molten sulfur in the 334 508K range
ρl	1844.36	kg/m3	339.40	Density of molten sulfur in the 334 508K range
ρl	1842.46	kg/m3	340.40	Density of molten sulfur in the 334 508K range
ρl	1841.94	kg/m3	341.40	Density of molten sulfur in the 334 508K range
ρl	1841.42	kg/m3	342.50	Density of molten sulfur in the 334 508K range
ρl	1839.87	kg/m3	343.50	Density of molten sulfur in the 334 508K range
ρl	1839.87	kg/m3	344.50	Density of molten sulfur in the 334 508K range
ρl	1838.15	kg/m3	346.60	Density of molten sulfur in the 334 508K range
ρl	1837.81	kg/m3	348.60	Density of molten sulfur in the 334 508K range
ρl	1835.41	kg/m3	350.80	Density of molten sulfur in the 334 508K range
ρl	1833.18	kg/m3	352.80	Density of molten sulfur in the 334 508K range
ρl	1830.97	kg/m3	354.80	Density of molten sulfur in the 334 508K range
ρl	1829.77	kg/m3	356.90	Density of molten sulfur in the 334 508K range
ρl	1828.24	kg/m3	358.90	Density of molten sulfur in the 334 508K range
ρl	1823.16	kg/m3	361.00	Density of molten sulfur in the 334 508K range
ρl	1823.16	kg/m3	363.10	Density of molten sulfur in the 334 508K range
ρl	1821.81	kg/m3	365.10	Density of molten sulfur in the 334 508K range
ρl	1821.14	kg/m3	367.30	Density of molten sulfur in the 334 508K range
ρl	1817.43	kg/m3	369.30	Density of molten sulfur in the 334 508K range
ρl	1815.76	kg/m3	371.30	Density of molten sulfur in the 334 508K range
ρl	1813.41	kg/m3	373.40	Density of molten sulfur in the 334 508K range
ρl	1810.74	kg/m3	375.40	Density of molten sulfur in the 334 508K range
ρl	1809.08	kg/m3	377.50	Density of molten sulfur in the 334 508K range
ρl	1808.41	kg/m3	379.50	Density of molten sulfur in the 334 508K range
ρl	1807.08	kg/m3	381.60	Density of molten sulfur in the 334 508K range
ρl	1804.76	kg/m3	383.80	Density of molten sulfur in the 334 508K range
ρl	1801.46	kg/m3	385.80	Density of molten sulfur in the 334 508K range
ρl	1798.16	kg/m3	387.80	Density of molten sulfur in the 334 508K range
ρl	1795.87	kg/m3	389.90	Density of molten sulfur in the 334 508K range
ρl	1794.55	kg/m3	391.90	Density of molten sulfur in the 334 508K range
ρl	1792.92	kg/m3	394.00	Density of molten sulfur in the 334 508K range
ρl	1789.33	kg/m3	396.10	Density of molten sulfur in the 334 508K range
ρl	1788.19	kg/m3	398.10	Density of molten sulfur in the 334 508K range
ρl	1787.06	kg/m3	400.20	Density of molten sulfur in the 334 508K range
ρl	1784.95	kg/m3	402.20	Density of molten sulfur in the 334 508K range
ρl	1782.84	kg/m3	404.30	Density of molten sulfur in the 334 508K range
ρl	1780.59	kg/m3	406.40	Density of molten sulfur in the 334 508K range
ρl	1778.65	kg/m3	408.40	Density of molten sulfur in the 334 508K range
ρl	1777.37	kg/m3	410.50	Density of molten sulfur in the 334 508K range
ρl	1777.05	kg/m3	412.50	Density of molten sulfur in the 334 508K range
ρl	1774.16	kg/m3	414.60	Density of molten sulfur in the 334 508K range
ρl	1770.65	kg/m3	416.70	Density of molten sulfur in the 334 508K range
ρl	1770.01	kg/m3	418.70	Density of molten sulfur in the 334 508K range
ρl	1766.51	kg/m3	420.80	Density of molten sulfur in the 334 508K range
ρl	1768.10	kg/m3	422.80	Density of molten sulfur in the 334 508K range
ρl	1765.25	kg/m3	424.90	Density of molten sulfur in the 334 508K range
ρl	1762.40	kg/m3	426.90	Density of molten sulfur in the 334 508K range
ρl	1761.77	kg/m3	429.10	Density of molten sulfur in the 334 508K range
ρl	1760.03	kg/m3	431.00	Density of molten sulfur in the 334 508K range
ρl	1759.56	kg/m3	433.10	Density of molten sulfur in the 334 508K range
ρl	1759.25	kg/m3	435.10	Density of molten sulfur in the 334 508K range
ρl	1757.99	kg/m3	437.30	Density of molten sulfur in the 334 508K range
ρl	1756.73	kg/m3	439.30	Density of molten sulfur in the 334 508K range
ρl	1755.79	kg/m3	441.30	Density of molten sulfur in the 334 508K range
ρl	1757.05	kg/m3	443.40	Density of molten sulfur in the 334 508K range
ρl	1756.11	kg/m3	445.40	Density of molten sulfur in the 334 508K range
ρl	1754.85	kg/m3	447.50	Density of molten sulfur in the 334 508K range
ρl	1751.57	kg/m3	449.60	Density of molten sulfur in the 334 508K range
ρl	1751.57	kg/m3	451.60	Density of molten sulfur in the 334 508K range
ρl	1751.10	kg/m3	453.80	Density of molten sulfur in the 334 508K range
ρl	1749.55	kg/m3	455.80	Density of molten sulfur in the 334 508K range
ρl	1747.68	kg/m3	457.80	Density of molten sulfur in the 334 508K range
ρl	1748.21	kg/m3	459.90	Density of molten sulfur in the 334 508K range
ρl	1746.13	kg/m3	461.90	Density of molten sulfur in the 334 508K range
ρl	1744.89	kg/m3	464.00	Density of molten sulfur in the 334 508K range
ρl	1743.04	kg/m3	466.00	Density of molten sulfur in the 334 508K range
ρl	1740.57	kg/m3	468.10	Density of molten sulfur in the 334 508K range
ρl	1742.73	kg/m3	470.30	Density of molten sulfur in the 334 508K range
ρl	1739.95	kg/m3	472.30	Density of molten sulfur in the 334 508K range
ρl	1740.57	kg/m3	474.30	Density of molten sulfur in the 334 508K range
ρl	1739.65	kg/m3	476.30	Density of molten sulfur in the 334 508K range
ρl	1737.49	kg/m3	478.40	Density of molten sulfur in the 334 508K range
ρl	1737.95	kg/m3	480.40	Density of molten sulfur in the 334 508K range
ρl	1736.88	kg/m3	481.50	Density of molten sulfur in the 334 508K range
ρl	1735.96	kg/m3	482.50	Density of molten sulfur in the 334 508K range
ρl	1735.35	kg/m3	483.50	Density of molten sulfur in the 334 508K range
ρl	1736.88	kg/m3	484.60	Density of molten sulfur in the 334 508K range
ρl	1734.74	kg/m3	485.60	Density of molten sulfur in the 334 508K range
ρl	1730.46	kg/m3	486.60	Density of molten sulfur in the 334 508K range
ρl	1731.83	kg/m3	487.80	Density of molten sulfur in the 334 508K range
ρl	1731.68	kg/m3	488.80	Density of molten sulfur in the 334 508K range
ρl	1728.64	kg/m3	489.80	Density of molten sulfur in the 334 508K range
ρl	1728.94	kg/m3	490.80	Density of molten sulfur in the 334 508K range
ρl	1728.64	kg/m3	491.80	Density of molten sulfur in the 334 508K range
ρl	1727.73	kg/m3	492.80	Density of molten sulfur in the 334 508K range
ρl	1727.12	kg/m3	493.80	Density of molten sulfur in the 334 508K range
ρl	1727.58	kg/m3	494.90	Density of molten sulfur in the 334 508K range
ρl	1728.03	kg/m3	495.90	Density of molten sulfur in the 334 508K range
ρl	1726.67	kg/m3	496.90	Density of molten sulfur in the 334 508K range
ρl	1725.30	kg/m3	498.00	Density of molten sulfur in the 334 508K range
ρl	1724.70	kg/m3	499.00	Density of molten sulfur in the 334 508K range
ρl	1723.49	kg/m3	500.00	Density of molten sulfur in the 334 508K range
ρl	1724.09	kg/m3	501.00	Density of molten sulfur in the 334 508K range
ρl	1722.89	kg/m3	502.10	Density of molten sulfur in the 334 508K range
ρl	1721.98	kg/m3	503.10	Density of molten sulfur in the 334 508K range
ρl	1721.53	kg/m3	504.10	Density of molten sulfur in the 334 508K range
ρl	1719.87	kg/m3	505.30	Density of molten sulfur in the 334 508K range
ρl	1720.17	kg/m3	506.30	Density of molten sulfur in the 334 508K range
ρl	1717.47	kg/m3	507.30	Density of molten sulfur in the 334 508K range

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.44e-03; 100.20]	kPa	[375.15; 717.15]	The Yaws Handbook of Vapor Pressure
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.60978e+01
Coefficient B			-7.97842e+03
Coefficient C			-2.28100e+01
Temperature range, min.			375.15
Temperature range, max.			717.15
Pvap	1.44e-03	kPa	375.15	Calculated Property
Pvap	0.01	kPa	413.15	Calculated Property
Pvap	0.08	kPa	451.15	Calculated Property
Pvap	0.36	kPa	489.15	Calculated Property
Pvap	1.32	kPa	527.15	Calculated Property
Pvap	4.00	kPa	565.15	Calculated Property
Pvap	10.49	kPa	603.15	Calculated Property
Pvap	24.41	kPa	641.15	Calculated Property
Pvap	51.52	kPa	679.15	Calculated Property
Pvap	100.20	kPa	717.15	Calculated Property

Mixtures

• sulfur + gallium
• sulfur + Indium
• sulfur + Hydrogen sulfide
• Toluene + sulfur
• p-Xylene + sulfur
• sulfur + Benzene, chloro-
• sulfur + Cyclohexane
• Methane + sulfur

Sources

• The solubility of H2S in liquid sulfur
• The diffusion coefficient of H2S in liquid sulfur
• Solubility of elemental sulfur in pure organic solvents and organic solvent-ionic liquid mixtures from 293.15 to 353.15 K
• Thermochemical studies of three bis(O-alkyl-N-benzoylthiocarbamato)nickel(II) complexes
• Standard molar enthalpies of formation of two crystalline bis[N-(diethylaminothiocarbonyl)benzamidinato]nickel(II) complexes
• Standard molar enthalpies of formation of copper(II) beta-diketonates and monothio-beta-diketonates
• Standard molar enthalpies of formation of nickel(II) I2-diketonates and monothio-I2-diketonates
• Determination of the energies of combustion and enthalpies of formation of nitrobenzenesulfonamides by rotating-bomb combustion calorimetry
• Energetic and structural properties of 4-nitro-2,1,3-benzothiadiazole
• Experimental redetermination of the gas-phase enthalpy of formation of ethyl 2-thiophenecarboxylate
• Gibbs free energy of formation of rhodium sulfides
• Experimentally determined thermodynamic properties of schapbachite (a-AgBiS2) below T = 700 K
• Enthalpy of formation of natural hydrous copper sulfate: Chalcanthite
• Thermodynamic study in the Ag-Sb-S system by the EMF method
• Experimental and computational thermochemical study of two fluorobenzazoles: 5-fluoro-2-methylbenzoxazole and 5-fluoro-2-methylbenzothiazole
• Chemical bonding and thermodynamic properties of gallium and indium monochalcogenides
• Density of molten sulfur in the 334 508K range
• Experimental Studies of Solubility of Elemental Sulfur in Methane at 363.15 K for Pressure Ranging from (4 to 25) MPa
• KDB
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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