Sodium chloride (data page)

This page provides supplementary chemical data on sodium chloride.

Material safety data sheet

The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the material safety data sheet (MSDS) for this chemical from a reliable source such as eChemPortal, and follow its direction.

Structure and properties

Structure and properties
Index of refraction, nD 1.5442
Abbe number ?
Dielectric constant, 6.12 at 17–22 °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility −30.3×10−6 cgs

Thermodynamic properties

Phase behavior
Triple point 1074 K (801 °C), 30 Pa
Critical point 3900 K (3600 °C), 26×106 Pa
Std enthalpy change
of fusion, ΔfusHo 		27.95 kJ/mol (0.52 kJ/g)[1][2]
Std entropy change
of fusion, ΔfusSo 		26.02 J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo 		130.05 @ T-Boiling kJ/mol
Std entropy change
of vaporization, ΔvapSo 		? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid 		−411.12 kJ/mol[2]
Standard molar entropy,
Sosolid 		72 J/(mol·K)
Heat capacity, cp 50 J/(mol·K) ; 0.853 J/(g·k)[2]
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid 		−385.92 kJ/mol
Standard molar entropy,
Soliquid 		95.06 J/(mol·K)
Density 1.549 g/cm3,[2] at 850 °C
Heat capacity, cp ? J/(mol·K)
Boiling point 1465 °C[2]
Gas properties
Std enthalpy change
of formation, ΔfHogas 		−181.42 kJ/mol
Standard molar entropy,
Sogas 		229.79 J/(mol·K)
Heat capacity, cp ? J/(mol·K)

Density data of aqueous solutions

Water–NaCl phase diagram
Properties of water–NaCl mixtures [3]
NaCl, wt% Teq, °C ρ, g/cm3 n η, mPa·s
0 0 0.99984 1.333 1.002
0.5 −0.3 1.0018 1.3339 1.011
1 −0.59 1.0053 1.3347 1.02
2 −1.19 1.0125 1.3365 1.036
3 −1.79 1.0196 1.3383 1.052
4 −2.41 1.0268 1.34 1.068
5 −3.05 1.034 1.3418 1.085
6 −3.7 1.0413 1.3435 1.104
7 −4.38 1.0486 1.3453 1.124
8 −5.08 1.0559 1.347 1.145
9 −5.81 1.0633 1.3488 1.168
10 −6.56 1.0707 1.3505 1.193
12 −8.18 1.0857 1.3541 1.25
14 −9.94 1.1008 1.3576 1.317
16 −11.89 1.1162 1.3612 1.388
18 −14.04 1.1319 1.3648 1.463
20 −16.46 1.1478 1.3684 1.557
22 −19.18 1.164 1.3721 1.676
23.3 −21.1
23.7 −17.3
24.9 −11.1
26.1 −2.7
26.28 0
26.32 10
26.41 20
26.45 25
26.52 30
26.67 40
26.84 50
27.03 60
27.25 70
27.5 80
27.78 90
28.05 100

Note: ρ is density, n is refractive index at 589 nm,[clarification needed] and η is viscosity, all at 20 °C; Teq is the equilibrium temperature between two phases: ice/liquid solution for Teq < 0–0.1 °C and NaCl/liquid solution for Teq above 0.1 °C.

Spectral data

UV-Vis
λmax ? nm
Extinction coefficient, ε ?
IR
Major absorption bands ? cm−1
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments 		 
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References

  1. ^ "NaCl CID 5234, 4.2.14 Other Experimental Properties"
  2. ^ a b c d e "NaCl Other Chemical/Physical Properties"[dead link‍]
  3. ^ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton, Florida: CRC Press. pp. 8–71, 8–116. ISBN 0-8493-0486-5.