Dimethyl sulfoxide (data page)

This page provides supplementary chemical data on dimethyl sulfoxide.

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1 Material Safety Data Sheet
2 Structure and properties
3 Thermodynamic properties
4 Vapor pressure of liquid
5 Distillation data
6 Spectral data
7 References

Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions. MSDS is available at Mallinckrodt Baker.

Structure and properties

Structure and properties
Index of refraction^[1], n_D	1.4795 at 20°C 1.4787 at 21°C
Abbe number	?
Dielectric constant,^[2] ε_r	48 ε₀ at 20 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension^[2]	43 dyn/cm at 20°C
Viscosity	2.14 mPa·s^[2] at 20°C 1.1 mP·s^[1] at 27°C

Thermodynamic properties

Phase behavior
Triple point	291.67 K (18.52 °C), ? Pa
Critical point^[2]	720 K (447 °C), 5630 kPa
Std enthalpy change of fusion, Δ_fusH^o	14.37 kJ/mol
Std entropy change of fusion, Δ_fusS^o	49.26 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	52.9 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	–203.4 kJ/mol
Standard molar entropy, S^o_liquid	188.78 J/(mol K)
Enthalpy of combustion, Δ_cH^o	–2037.3 kJ/mol
Heat capacity, c_p	153 J/(mol K) at 25°C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	–150.5 kJ/mol
Standard molar entropy, S^o_gas	? J/(mol K)
Heat capacity, c_p	? J/(mol K)

Vapor pressure of liquid

vapor pressure at 20°C = 0.0556 mbar = 0.0417 mmHg^[2]

Distillation data

BP Temp. °C	% by mole water
Vapor-liquid Equilibrium for Dimethyl Sulfoxide/Water^[4] P = 550 mm Hg
BP Temp. °C	liquid	vapor
168.4	6.5	34.6
160.9	10.8	51.8
153.1	16.4	62.7
146.4	21.2	71.0
140.6	26.7	78.4
135.1	32.1	83.9
130.8	37.4	87.6
124.3	44.8	91.7
121.0	48.5	93.5
114.9	55.4	96.0
107.8	66.4	98.0
102.1	74.4	98.9
97.2	84.0	99.6
96.3	85.7	99.6
93.9	91.9	99.8

BP Temp. °C	% by mole DMSO
Vapor-liquid Equilibrium for Dimethyl Sulfoxide/Ethanol^[4] P = 14.665 kPa
BP Temp. °C	liquid	vapor
55.80	48.75	1.0
64.50	59.75	1.6
66.75	64.00	2.5
70.80	71.00	3.6
76.50	76.25	5.0
81.50	80.50	6.0
91.50	85.00	13.0
100.74	90.00	21.0

Spectral data

UV-Vis
λ_max	? nm
Extinction coefficient, ε	?
IR
Sectrum	NIST
Major absorption bands	3000, 2900, 1200-1240, 1000-1080, 960, 690 cm⁻¹
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

References

^ ^a ^b Merck Index of Chemicals and Drugs, 9th ed. monograph 3249
^ ^a ^b ^c ^d ^e Dimethyl Sulfoxide (DMSO) -- Technical. Atofina Chemicals, inc. Retrieved on 26 May 2007.
^ Pure Component Properties (Queriable database). Chemical Engineering Research Information Center. Retrieved on 26 May 2007.
^ ^a ^b Binary Vapor-Liquid Equilibrium Data (Queriable database). Chemical Engineering Research Information Center. Retrieved on 26 May 2007.

NIST Standard Reference Database].

Except where noted otherwise, data relate to standard ambient temperature and pressure.

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Dimethyl_sulfoxide_(data_page)". A list of authors is available in Wikipedia.