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 cgs
Thermodynamic properties
Phase behavior Triple point 1074 K (801 °C), 30 Pa Critical point 3900 K (3600 °C), 26 Pa Std enthalpy changeof fusion, ΔfusHo 30.39 kJ/mol (0.52 kJ/g)"NaCl CID 5234, 4.2.14 Other Experimental Properties""NaCl Other Chemical/Physical Properties" Std entropy changeof fusion, ΔfusSo 26.02 J/(mol·K) Std enthalpy changeof vaporization, ΔvapHo 130.05 @ T-Boiling kJ/mol Std entropy changeof vaporization, ΔvapSo ? J/(mol·K) Solid properties Std enthalpy changeof formation, ΔfHosolid −411.12 kJ/mol Standard molar entropy,Sosolid 72 J/(mol·K) Heat capacity, cp 50 J/(mol·K) ; 0.853 J/(g·k) Liquid properties Std enthalpy changeof formation, ΔfHoliquid −385.92 kJ/mol Standard molar entropy,Soliquid 95.06 J/(mol·K) Density 1.549 g/cm3, at 850 °C Heat capacity, cp ? J/(mol·K) Boiling point 1465 °C Gas properties Std enthalpy changeof 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
+ Properties of water–NaCl mixtures NaCl, wt% Teq, °C ρ, g/cm3 n η, mPa·s0 0 0.99984 1.333 1.0020.5 −0.3 1.0018 1.3339 1.0111 −0.59 1.0053 1.3347 1.022 −1.19 1.0125 1.3365 1.0363 −1.79 1.0196 1.3383 1.0524 −2.41 1.0268 1.34 1.0685 −3.05 1.034 1.3418 1.0856 −3.7 1.0413 1.3435 1.1047 −4.38 1.0486 1.3453 1.1248 −5.08 1.0559 1.347 1.1459 −5.81 1.0633 1.3488 1.16810 −6.56 1.0707 1.3505 1.19312 −8.18 1.0857 1.3541 1.2514 −9.94 1.1008 1.3576 1.31716 −11.89 1.1162 1.3612 1.38818 −14.04 1.1319 1.3648 1.46320 −16.46 1.1478 1.3684 1.55722 −19.18 1.164 1.3721 1.67623.3 −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, 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
References
External links vapour pressure J Chem Thermod