Sodium sulfate (data page)

This page provides supplementary chemical data on sodium sulfate.

Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Safety Data Sheet (SDS) for this chemical from the manufacturer and follow its directions.

Structure and properties

Structure and properties[1]
Index of refraction, nD
Abbe number	?
Dielectric constant, εr	anhydrous: 7.90 at r.t. decahydrate: 5.0 at r.t. pentahydrate: 7 at 250-290K
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility, χm	anhydrous: -52 x10−6 cm3 mol−1 decahydrate: -184 x10−6 cm3 mol−1
Surface tension	194.8 dyn/cm (194.8 mN/m) (at 900  °C) 184.7 dyn/cm (184.7 mN/m) (at 1077 °C)

Thermodynamic properties

Phase behavior
Triple point	? K (? °C), ? Pa
Critical point	? K (? °C), ? Pa
Std enthalpy change of fusion, ΔfusHo	200.8 kJ/mol[1]
Std entropy change of fusion, ΔfusSo	? J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	? kJ/mol
Std entropy change of vaporization, ΔvapSo	? J/(mol·K)
Solid properties
Std enthalpy change of formation, ΔfHosolid	-1387.1 kJ/mol
Standard molar entropy, Sosolid	149.6 J/(mol K)
Heat capacity, cp	128.2 J/(mol K)
Entropy change of solution[1]	2.1 J/(mol K)
Liquid properties
Std enthalpy change of formation, ΔfHoliquid	? kJ/mol
Standard molar entropy, Soliquid	? J/(mol K)
Heat capacity, cp	?kJ/(mol K)
Gas properties[2]
Std enthalpy change of formation, ΔfHogas	-1033.62 kJ/mol
Standard molar entropy, Sogas	346.84 J/(mol K)
Heat capacity, cp	? J/(mol K)

Spectral data

UV-Vis
λmax	? nm
Extinction coefficient, ε	?
IR
Major absorption bands[3]	(nujol mull, nujol pks not listed) Wave number transmittance 1124 cm−1 10% (br) 638 cm−1 42% 618 cm−1 35%
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

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• Except where noted otherwise, data relate to Standard temperature and pressure.
• Reliability of data general note.